{"id":12887,"date":"2025-09-24T10:47:36","date_gmt":"2025-09-24T09:47:36","guid":{"rendered":"https:\/\/mcqsadda.com\/?p=12887"},"modified":"2026-01-13T10:36:02","modified_gmt":"2026-01-13T10:36:02","slug":"control-and-coordination-in-human-top-100-mcqs-with-answer-and-explanation","status":"publish","type":"post","link":"https:\/\/mcqsadda.com\/index.php\/2025\/09\/24\/control-and-coordination-in-human-top-100-mcqs-with-answer-and-explanation\/","title":{"rendered":"Control and coordination in human Top 100 MCQs With Answer and Explanation"},"content":{"rendered":"\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">1. The system responsible for control and coordination in humans is _________.<br><\/mark><\/strong>A) Respiratory system<br>B) Nervous and endocrine systems<br>C) Circulatory system<br>D) Digestive system<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Nervous system controls quick responses; endocrine system regulates hormones.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">2. The structural and functional unit of the nervous system is <strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Axon<br>B) Dendrite<br>C) Neuron<br>D) Nerve<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Neurons transmit information through electrical impulses.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">3. Which part of a neuron receives impulses?<br><\/mark><\/strong>A) Axon<br>B) Dendrite<br>C) Myelin sheath<br>D) Synapse<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Dendrites receive signals from other neurons or receptors.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">4. Which part of neuron carries impulse away from cell body?<br><\/mark><\/strong>A) Axon<br>B) Dendrite<br>C) Soma<br>D) Nissl\u2019s granules<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Axon transmits signals to next neuron or effector.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">5. The gap between two neurons is called<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Synapse<br>B) Node of Ranvier<br>C) Myelin sheath<br>D) Axolemma<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Synapse transmits impulses chemically via neurotransmitters.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">6. Which chemical helps in transmission of impulse across synapse?<br><\/mark><\/strong>A) Insulin<br>B) Acetylcholine<br>C) Thyroxine<br>D) Pepsin<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Acetylcholine is a neurotransmitter that transmits impulses across synapses.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">7. The insulating covering of axons is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Dendrite<br>B) Myelin sheath<br>C) Synaps<br>D) Gray matter<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Myelin sheath increases speed of nerve impulse conduction.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">8. Neurons without myelin sheath are called<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Gray matter neurons<br>B) White matter neurons<br>C) Non-nervous cells<br>D) Sensory receptors<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Non-myelinated neurons form gray matter; myelinated neurons form white matter.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">9. Which type of neuron carries impulses from sense organs to CNS?<br><\/mark><\/strong>A) Motor neurons<br>B) Sensory neurons<br>C) Relay neurons<br>D) Effector neurons<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Sensory neurons transmit impulses from receptors to CNS.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">10. Motor neurons carry signals from<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) CNS to muscles\/glands<br>B) Muscles to CNS<br>C) One neuron to another<br>D) Brain to spinal cord only<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Motor neurons connect CNS to effectors like muscles and glands.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">11. Which neurons connect sensory and motor neurons?<br><\/mark><\/strong>A) Relay (interneurons)<br>B) Sensory neurons<br>C) Axonal neurons<br>D) Dendritic neurons<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Relay neurons link sensory and motor neurons inside CNS.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">12. Which ion plays the key role in nerve impulse conduction?<br><\/mark><\/strong>A) Calcium<br>B) Potassium<br>C) Sodium<br>D) Both sodium and potassium<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: D  <\/b><BR>\n<b>Explanation:<\/b>  Sodium-potassium exchange creates action potential in neurons.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">13. The time taken for a nerve impulse to recover is called<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Refractory period<br>B) Latent period<br>C) Resting period<br>D) Impulse gap<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Refractory period ensures impulses travel in one direction only.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">14. The speed of nerve impulse in myelinated neurons is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Slower than non-myelinated<br>B) Faster than non-myelinated<br>C) Same as non-myelinated<br>D) Zero<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Myelin sheath enables saltatory conduction, speeding impulses.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">15. Which part of the nervous system includes brain and spinal cord?<br><\/mark><\/strong>A) CNS<br>B) PNS<br>C) ANS<br>D) SNS<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Central Nervous System (CNS) consists of brain and spinal cord.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">16. Which part of nervous system connects CNS to body parts?<br><\/mark><\/strong>A) PNS<br>B) CNS<br>C) ANS<br>D) SNS<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Peripheral Nervous System (PNS) includes cranial and spinal nerves.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">17. Which system controls involuntary actions like heartbeat?<br><\/mark><\/strong>A) CNS<br>B) PNS<br>C) ANS<br>D) SNS<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Autonomic Nervous System (ANS) regulates involuntary activities.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">18. Sympathetic nervous system generally<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Relaxes body<br>B) Prepares body for emergency (fight or flight)<br>C) Increases digestion<br>D) Decreases heart rate<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Sympathetic nerves increase heart rate, respiration, and energy supply.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">19. Parasympathetic nervous system generally<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Prepares for fight<br>B) Conserves energy and calms body<br>C) Stops digestion<br>D) Stops sleep<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Parasympathetic nerves promote rest, digestion, and recovery.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">20. Which nervous system controls voluntary actions?<br><\/mark><\/strong>A) ANS<br>B) CNS<br>C) Somatic nervous system<br>D) Parasympathetic nervous system<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Somatic system controls voluntary movements like walking.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">21. The nervous system works along with<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Endocrine system<br>B) Digestive system<br>C) Respiratory system<br>D) Reproductive system<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Both systems regulate and coordinate body activities.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">22. Which part of neuron contains nucleus?<br><\/mark><\/strong>A) Axon<br>B) Soma (cell body)<br>C) Dendrite<br>D) Synapse<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  The cell body contains the nucleus and Nissl\u2019s granules.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">23. Nissl\u2019s granules in neuron are made of<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Protein<br>B) Lipid<br>C) RNA and proteins<br>D) DNA only<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Nissl\u2019s granules help in protein synthesis inside neurons.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">24. The junction between axon terminal and muscle fiber is called<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Neurofibril junction<br>B) Neuromuscular junction<br>C) Synapse<br>D) Motor cord<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Here motor neurons transmit impulses to muscles.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">25. Which neurotransmitter deficiency causes Parkinson\u2019s disease?<br><\/mark><\/strong>A) Dopamine<br>B) Acetylcholine<br>C) Serotonin<br>D) GABA<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Low dopamine levels in brain cause Parkinson\u2019s symptoms.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">26. The human brain is protected by<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Ribs<br>B) Skull<br>C) Sternum<br>D) Spine<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  The skull (cranium) encloses and protects the brain.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">27. The protective fluid around the brain and spinal cord is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Blood<br>B) Synovial fluid<br>C) Cerebrospinal fluid (CSF)<br>D) Lymph<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  CSF cushions the brain and spinal cord, protecting against shocks.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">28. The largest part of the human brain is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Cerebellum<br>B) Medulla oblongata<br>C) Cerebrum<br>D) Hypothalamus<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  The cerebrum controls intelligence, memory, voluntary actions, and sensory processing.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">29. Which part of brain coordinates voluntary movements and balance?<br><\/mark><\/strong>A) Cerebrum<br>B) Cerebellum<br>C) Medulla<br>D) Hypothalamus<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  The cerebellum maintains posture, balance, and fine muscle coordination.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">30. Which part of the brain controls involuntary actions like heartbeat and breathing?<\/mark><\/strong><br>A) Cerebrum<br>B) Cerebellum<br>C) Medulla oblongata<br>D) Thalamus<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Medulla controls vital involuntary activities such as heartbeat and respiration.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">31. Which part of brain regulates body temperature and hunger?<br><\/mark><\/strong>A) Thalamus<br>B) Cerebellum<br>C) Hypothalamus<br>D) Medulla<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Hypothalamus regulates temperature, hunger, thirst, and hormone control.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">32. The relay center of the brain for sensory information is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Thalamus<br>B) Hypothalamus<br>C) Medulla<br>D) Cerebellum<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Thalamus acts as a relay station for sensory and motor signals.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">33. The brain is divided into how many main regions?<br><\/mark><\/strong>A) Two<br>B) Three<br>C) Four<br>D) Five<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Forebrain, midbrain, and hindbrain are the three major regions.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">34. The forebrain consists of<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Cerebellum, medulla, pons<br>B) Cerebrum, thalamus, hypothalamus<br>C) Midbrain, pons, medulla<br>D) Spinal cord and cerebellum<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  These structures form the forebrain, responsible for higher functions.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">35. The hindbrain consists of<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Medulla, pons, cerebellum<br>B) Thalamus, hypothalamus, cerebrum<br>C) Midbrain and pons<br>D) Cerebrum only<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Hindbrain controls involuntary functions, coordination, and balance.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">36. The midbrain is mainly associated with:<br><\/mark><\/strong>A) Balance and posture<br>B) Vision and hearing reflexes<br>C) Breathing<br>D) Memory<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Midbrain controls reflex movements of eyes and auditory responses.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">37. Which lobe of cerebrum is associated with vision?<br><\/mark><\/strong>A) Frontal lobe<br>B) Parietal lobe<br>C) Temporal lobe<br>D) Occipital lobe<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: D  <\/b><BR>\n<b>Explanation:<\/b>  The occipital lobe processes visual information.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">38. Which lobe of cerebrum controls speech and reasoning?<br><\/mark><\/strong>A) Frontal lobe<br>B) Parietal lobe<br>C) Temporal lobe<br>D) Occipital lobe<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>   The frontal lobe controls thinking, speech, and voluntary movement.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">39. Which part of brain controls smell?<br><\/mark><\/strong>A) Frontal lobe<br>B) Temporal lobe<br>C) Olfactory bulb<br>D) Cerebellum<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Olfactory bulbs in the forebrain process smell.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">40. Which part of brain regulates emotions like fear and pleasure?<br><\/mark><\/strong>A) Medulla<br>B) Limbic system<br>C) Cerebellum<br>D) Pons<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  The limbic system governs emotions and memory.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">41. Which part of the nervous system controls reflex actions?<br><\/mark><\/strong>A) Brain<br>B) Spinal cord<br>C) Cerebellum<br>D) Medulla<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Reflexes are automatic responses controlled by spinal cord.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">42. The path taken by nerve impulses in a reflex action is called<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><\/mark><\/strong><br>A) Reflex arc<br>B) Nerve arc<br>C) Impulse arc<br>D) Motor arc<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Reflex arc includes receptor \u2192 sensory neuron \u2192 spinal cord \u2192 motor neuron \u2192 effector.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">43. Knee-jerk response is an example of<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><\/mark><\/strong><br>A) Voluntary action<br>B) Reflex action<br>C) Hormonal action<br>D) Conditioned action<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Knee-jerk is a simple reflex controlled by spinal cord.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">44. Reflex actions are<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><\/mark><\/strong><br>A) Voluntary<br>B) Involuntary<br>C) Both voluntary and involuntary<br>D) Conditional<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Reflexes occur automatically without conscious effort.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">45. Which of the following is NOT a reflex action?<br><\/mark><\/strong>A) Sneezing<br>B) Blinking<br>C) Walking<br>D) Coughing<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Walking is a voluntary, coordinated action. Others are reflexes.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">46. Conditioned reflex was first demonstrated by<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Pavlov<br>B) Darwin<br>C) Newton<br>D) Harvey<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Ivan Pavlov showed conditioned reflexes in dogs (salivation to bell sound).\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">47. Which nerve connects the eye to the brain?<br><\/mark><\/strong>A) Auditory nerve<br>B) Optic nerve<br>C) Olfactory nerve<br>D) Trigeminal nerve<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Optic nerve transmits visual information to the brain.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">48. Which nerve controls hearing and balance?<br><\/mark><\/strong>A) Auditory (vestibulocochlear) nerve<br>B) Optic nerve<br>C) Olfactory nerve<br>D) Vagus nerve<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  This nerve transmits sound and balance information from ear to brain.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">49. The longest nerve in the human body is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Sciatic nerve<br>B) Optic nerve<br>C) Vagus nerve<br>D) Facial nerve<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Sciatic nerve extends from spinal cord to the legs.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">50. Which part of brain is affected in Parkinson\u2019s disease?<br><\/mark><\/strong>A) Cerebellum<br>B) Midbrain (substantia nigra)<br>C) Medulla<br>D) Cerebrum<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Degeneration of dopamine-producing neurons in substantia nigra causes Parkinson\u2019s.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">51. The human eye is an organ of<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Hearing<br>B) Sight<br>C) Touch<br>D) Smell<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  The eye detects light and converts it into electrical signals for vision.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">52. The colored part of the eye that controls entry of light is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Retina<br>B) Iris<br>C) Cornea<br>D) Lens<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  The iris regulates pupil size and controls amount of light entering.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">53. The transparent layer covering the front of the eye is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Retina<br>B) Cornea<br>C) Iris<br>D) Lens<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  The cornea bends light rays towards the lens.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">54. The eye lens is held in place by<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Optic nerve<br>B) Ciliary muscles<br>C) Iris<br>D) Retina<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Ciliary muscles adjust lens curvature for focusing (accommodation).\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">55. The innermost light-sensitive layer of the eye is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Retina<br>B) Cornea<br>C) Sclera<br>D) Iris<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Retina has photoreceptor cells (rods and cones) that detect light.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">56. Which cells in retina help in night vision?<br><\/mark><\/strong>A) Cones<br>B) Rods<br>C) Bipolar cells<br>D) Ganglion cells<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Rods are sensitive to dim light, enabling night vision.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">57. Which cells in retina detect colors?<br><\/mark><\/strong>A) Rods<br>B) Cones<br>C) Bipolar cells<br>D) Ganglion cells<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Cones are responsible for color vision in bright light.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">58. The point where optic nerve leaves the eye is called<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Blind spot<br>B) Yellow spot<br>C) Retina<br>D) Pupil<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  No photoreceptors are present at the optic disc \u2192 no image formation.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">59. The area of retina with maximum cone cells is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Blind spot<br>B) Fovea centralis (yellow spot)<br>C) Cornea<br>D) Optic nerve<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Fovea provides sharpest vision due to high cone density.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">60. The defect where nearby objects appear blurred is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Myopia<br>B) Hypermetropia<br>C) Presbyopia<br>D) Astigmatism<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Hypermetropia = farsightedness \u2192 nearby objects blurred, corrected with convex lens.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">61. The defect where distant objects appear blurred is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Myopia<br>B) Hypermetropia<br>C) Presbyopia<br>D) Color blindness<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Myopia = nearsightedness \u2192 distant objects blurred, corrected with concave lens.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">62. Age-related loss of accommodation in eyes is called<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Myopia<br>B) Presbyopia<br>C) Astigmatism<br>D) Hypermetropia<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Presbyopia occurs due to reduced flexibility of lens in old age.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">63. The inability to distinguish colors is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Presbyopia<br>B) Color blindness<br>C) Cataract<br>D) Astigmatism<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Caused by absence\/deficiency of cone pigments, often inherited.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">64. Cataract is caused by<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Damage to optic nerve<br>B) Lens becoming opaque<br>C) Loss of rods<br>D) Fluid imbalance in eye<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Cataract clouds the lens, leading to blurred vision.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">65. The normal image formed in human eye is <strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Real and upright<br>B) Real and inverted<br>C) Virtual and inverted<br>D) Virtual and upright<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Lens forms real, inverted image on retina; brain interprets it upright.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">66. The fluid filling the eye behind the lens is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Aqueous humor<br>B) Vitreous humor<br>C) Synovial fluid<br>D) Lymph<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Vitreous humor maintains eye shape and optical path.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">67. The ear is primarily the organ of<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Balance and smell<br>B) Hearing and balance<br>C) Hearing only<br>D) Balance only<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Ear functions in sound perception and body equilibrium.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">68. The outer ear consists of <strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Pinna and ear canal<br>B) Eardrum and ossicles<br>C) Cochlea and semicircular canals<br>D) Eustachian tube<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Pinna collects sound and directs it to ear canal.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">69. The eardrum is scientifically called<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Tympanic membrane<br>B) Cochlea<br>C) Ossicle<br>D) Vestibule<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  The tympanic membrane vibrates in response to sound waves.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">70. The three small bones of middle ear are<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Hammer, anvil, stirrup<br>B) Malleus, incus, stapes<br>C) Both (a) and (b)<br>D) Cochlea, semicircular canal, vestibule<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Ossicles (malleus\/hammer, incus\/anvil, stapes\/stirrup) amplify sound vibrations.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">71. Which part of the inner ear helps in hearing?<br><\/mark><\/strong>A) Cochlea<br>B) Semicircular canals<br>C) Vestibule<br>D) Utricle<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Cochlea contains organ of Corti with hair cells that detect sound.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">72. Which part of ear helps maintain balance and posture?<br><\/mark><\/strong>A) Cochlea<br>B) Tympanum<br>C) Semicircular canals<br>D) Ossicles<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Semicircular canals detect head movements and maintain equilibrium.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">73. The tube that equalizes air pressure in middle ear is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Cochlear duct<br>B) Eustachian tube<br>C) Vestibular canal<br>D) Oval window<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  The Eustachian tube connects middle ear to throat, balancing pressure.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">74. Hearing loss due to old age is called <strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Myopia<br>B) Presbycusis<br>C) Tinnitus<br>D) Vertigo<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Presbycusis is age-related hearing impairment.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">75. The ringing sound in the ear without external noise is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Vertigo<br>B) Presbycusis<br>C) Tinnitus<br>D) Otitis<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Tinnitus is a buzzing or ringing sensation in ears due to ear or nerve issues.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">76. The system that controls long-term coordination in humans is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Nervous system<br>B) Endocrine system<br>C) Circulatory system<br>D) Skeletal system<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Endocrine system regulates metabolism, growth, reproduction, and stress responses via hormones.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">77. Hormones are secreted by<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Exocrine glands<br>B) Endocrine glands<br>C) Salivary glands<br>D) Digestive glands<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Endocrine glands are ductless glands that release hormones directly into blood.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">78. The \u201cmaster gland\u201d of the human body is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Thyroid gland<br>B) Pituitary gland<br>C) Adrenal gland<br>D) Pancreas<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Pituitary controls growth and regulates other endocrine glands.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">79. The hormone secreted by the anterior pituitary for growth is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Insulin<br>B) GH (Growth Hormone)<br>C) Thyroxine<br>D) Cortisol<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  GH regulates growth of bones and muscles.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">80. Over-secretion of GH in childhood leads to<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Dwarfism<br>B) Gigantism<br>C) Acromegaly<br>D) Cretinism<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Excess GH before puberty causes gigantism (abnormally tall growth).\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">81. Deficiency of GH in childhood causes<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><\/mark><br><\/strong>A) Acromegaly<br>B) Dwarfism<br>C) Cretinism<br>D) Diabetes<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  GH deficiency in children leads to short stature (dwarfism).\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">82. The gland located in the neck region is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><\/mark><\/strong><br>A) Adrenal<br>B) Pituitary<br>C) Thyroid<br>D) Pineal<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Thyroid gland lies in the neck and secretes thyroxine.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">83. Thyroxine hormone requires which element?<br><\/mark><\/strong>A) Calcium<br>B) Sodium<br>C) Iodine<br>D) Iron<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Iodine is essential for thyroxine synthesis.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">84. Deficiency of iodine in diet causes<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Diabetes<br>B) Goiter<br>C) Anemia<br>D) Rickets<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Iodine deficiency enlarges thyroid gland, leading to goiter.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">85. Cretinism is caused by deficiency of<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Insulin in adults<br>B) Thyroxine in children<br>C) GH in adults<br>D) Cortisol in children<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>   Low thyroxine during childhood causes mental retardation and stunted growth (cretinism).\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">86. The \u201cemergency hormone\u201d is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Thyroxine<br>B) Adrenaline<br>C) Insulin<br>D) Cortisone<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Adrenaline prepares the body for fight-or-flight responses.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">87. Adrenal glands are located<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) In the brain<br>B) Above kidneys<br>C) In pancreas<br>D) Below lungs<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Each adrenal gland sits on top of a kidney.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">88. Which hormone regulates blood sugar by decreasing glucose level?<br><\/mark><\/strong>A) Adrenaline<br>B) Thyroxine<br>C) Insulin<br>D) Glucagon<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Insulin (pancreas) lowers blood sugar by promoting glucose uptake.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">89. Deficiency of insulin causes<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Diabetes insipidus<br>B) Diabetes mellitus<br>C) Cretinism<br>D) Goiter<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>   Insulin deficiency increases blood glucose (hyperglycemia).\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">90. Glucagon hormone<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Decreases blood sugar<br>B) Increases blood sugar<br>C) Maintains body temperature<br>D) Controls calcium levels<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Glucagon raises glucose level by converting glycogen into glucose.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">91. The gland also acting as both endocrine and exocrine gland is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Pituitary<br>B) Adrenal<br>C) Pancreas<br>D) Thyroid<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Pancreas secretes insulin &#038; glucagon (endocrine) and digestive enzymes (exocrine).\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">92. The hormone regulating calcium metabolism is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Insulin<br>B) Parathormone<br>C) Adrenaline<br>D) Cortisol<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: B  <\/b><BR>\n<b>Explanation:<\/b>  Parathyroid hormone (PTH) regulates calcium and phosphate balance.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">93. Tetany (muscle spasm) is caused by deficiency of<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Calcium<br>B) Sodium<br>C) Potassium<br>D) Chloride<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Lack of PTH reduces blood calcium \u2192 muscle spasms (tetany).\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\"><strong>94. The pineal gland secretes<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/strong><\/mark>A) Melatonin<br>B) Cortisol<br>C) Insulin<br>D) Thyroxine<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Melatonin regulates biological clock, sleep-wake cycles.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">95. The thymus gland is mainly active during<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Infancy and childhood<br>B) Old age<br>C) Adulthood only<br>D) After 50 years<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Thymus produces thymosin, important for immunity in children.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">96. The hormone responsible for female secondary sexual characters is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Testosterone<br>B) Progesterone<br>C) Estrogen<br>D) Oxytocin<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Estrogen promotes female traits like breast development and menstrual cycle.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">97. The hormone responsible for male secondary sexual characters is<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Progesterone<br>B) Estrogen<br>C) Testosterone<br>D) LH<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Testosterone promotes male traits like beard, voice change, muscle growth.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">98. Oxytocin hormone is secreted by<strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">_________.<\/mark><\/strong><br><\/mark><\/strong>A) Thyroid<br>B) Adrenal<br>C) Pituitary (posterior lobe)<br>D) Pancreas<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: C  <\/b><BR>\n<b>Explanation:<\/b>  Oxytocin stimulates uterine contractions during childbirth and milk ejection.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">99. Which hormone is also called the \u201cmilk let-down hormone\u201d?<br><\/mark><\/strong>A) Estrogen<br>B) Progesterone<br>C) Prolactin<br>D) Oxytocin<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: D  <\/b><BR>\n<b>Explanation:<\/b>   Oxytocin helps in milk ejection from mammary glands during breastfeeding.\n <\/p>\n<\/div>\n\n\n\n<p class=\"has-large-font-size\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">100. Which pair of hormones regulates blood sugar levels?<br><\/mark><\/strong>A) Insulin and glucagon<br>B) Thyroxine and parathormone<br>C) GH and cortisol<br>D) Adrenaline and estrogen<\/p>\n\n\n\n<button class=\"acc\">Show Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"font-size: 22px;\"><b> Answer: A  <\/b><BR>\n<b>Explanation:<\/b>  Insulin lowers, and glucagon raises blood glucose \u2192 together they maintain balance.\n <\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>1. The system responsible for control and coordination in humans is _________.A) Respiratory systemB) Nervous and endocrine systemsC) Circulatory systemD) Digestive system Show Answer Answer: B Explanation: Nervous system controls quick responses; endocrine system regulates hormones. 2. The structural and functional unit of the nervous system is _________.A) AxonB) DendriteC) NeuronD) Nerve Show Answer Answer:<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[16332,16151,16133,16155,16154,16147,16158,16139,16320,16135,16323,16329,16301,16333,16335,16331,16324,16334,4029,16156,5649,5623,16321,16319,16326,16255,16327,16134,16325,16330,16322,16132,16328,16140],"class_list":{"0":"post-12887","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-biology","7":"tag-adrenal-gland","8":"tag-biology-learning","9":"tag-biology-mcqs","10":"tag-biology-preparation-material","11":"tag-biology-questions-and-answers","12":"tag-biology-quiz","13":"tag-biology-revision","14":"tag-biology-study-material","15":"tag-brain-structure","16":"tag-competitive-exam-biology","17":"tag-control-and-coordination","18":"tag-feedback-mechanism","19":"tag-homeostasis","20":"tag-hormonal-coordination","21":"tag-hormones","22":"tag-human-endocrine-system","23":"tag-human-nervous-system","24":"tag-human-physiology","25":"tag-mcqs-adda","26":"tag-mcqs-for-biology-exam","27":"tag-mcqs-for-pc-psi-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-exams","28":"tag-mcqs-for-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-exams","29":"tag-motor-neurons","30":"tag-nerves","31":"tag-neural-coordination","32":"tag-pancreas","33":"tag-pituitary-gland","34":"tag-psc-biology-mcqs","35":"tag-reflex-actions","36":"tag-sensory-organs","37":"tag-spinal-cord","38":"tag-ssc-biology-mcqs","39":"tag-thyroid-gland","40":"tag-upsc-biology-mcqs"},"_links":{"self":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12887","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/comments?post=12887"}],"version-history":[{"count":91,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12887\/revisions"}],"predecessor-version":[{"id":36595,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12887\/revisions\/36595"}],"wp:attachment":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/media?parent=12887"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/categories?post=12887"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/tags?post=12887"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}