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1. What is the primary function of the human heart?
A. Pumping blood
B. Digesting food
C. Filtering toxins
D. Producing hormones
ANSWER: A.Pumping blood
SOLUTION :Your heart’s main function is to move blood throughout your body. Blood brings oxygen and nutrients to your cells. It also takes away carbon dioxide and other waste so other organs can dispose of them.
2. Which chamber of the heart receives deoxygenated blood from the body?
A. Left atrium
B. Right atrium
C. Left ventricle
D. Right ventricle
ANSWER: B.Right atrium
SOLUTION:Right atrium receives deoxygenated blood from different body parts while right ventricle pumps deoxygenated blood to the lungs.
3. The heart is composed of how many chambers?
A. 2
B. 3
C. 4
D. 5
ANSWER : C.4
SOLUTION:There are four chambers: the left atrium and right atrium (upper chambers), and the left ventricle and right ventricle (lower chambers). The right side of your heart collects blood on its return from the rest of your body.
4. Which blood vessels carry oxygenated blood away from the heart?
A.Veins
B. Arteries
C. Capillaries
D. Venules
ANSWER: B. Arteries
SOLUTION:Arteries: These strong, muscular blood vessels carry oxygen-rich blood from your heart to your body. They handle a large amount of force and pressure from your blood flow but don’t carry a large volume of blood.
5. What is the name of the valve between the left atrium and left ventricle?
A. Tricuspid valve
B. Mitral valve
C. Pulmonary valve
D. Aortic valve
ANSWER: B. Mitral valve
SOLUTION:mitral valve: located between the left atrium and the left ventricle.
6. Which blood vessels return oxygenated blood to the heart from the lungs?
A. Pulmonary arteries
B. Pulmonary veins
C. Aorta
D. Coronary arteries
ANSWER: B.Pulmonary veins
SOLUTION: Pulmonary veins are blood vessels that carry oxygen-rich blood from your lungs to your heart. Your pulmonary veins are part of your body’s pulmonary circuit. This is a system of blood vessels that moves blood between your heart and your lungs. This circuit also includes your pulmonary arteries.
7. What is the pacemaker of the heart called?
A. Atrioventricular node (AV node)
B. Bundle of His
C. Sionatrial node(SA node)
D. Purkinje fibers
ANSWER: C.Sionatrial node(SA node)
SOLUTION:The sinoatrial (SA) node, also known as the sinus node, is the heart’s natural pacemaker. It’s a bundle of specialized cells located in the upper wall of the right atrium, where it meets the superior vena cava.
8. Which vessel supplies blood to the heart muscle itself?
A. Pulmonary artery
B. Coronary artery
C. Aorta
D. Pulmonary vein
ANSWER: B.Coronary artery
SOLUTION:The coronary arteries provide the main blood supply to the heart. The coronary arteries also supply the myocardium with oxygen to allow for the contraction of the heart and thus causing circulation of the blood throughout the body.
9. What is the average resting heart rate for adults?
A. 60 – 80 beats per minute
B. 100 – 120 beats per minute
C. 40 – 60 beats per minute
D. 120 – 140 beats per minute
ANSWER: A.60 – 80 beats per minute
SOLUTION: Answer From Edward R. Laskowski, M.D. A normal resting heart rate for adults ranges from 60 to 100 beats per minute.
10. Which part of the nervous system regulates the heart rate?
A. Sympathetic nervous system
B. Central nervous system
C. Parasympathetic nervous system
D. Autonomic nervous system
ANSWER: D.Autonomic nervous system
SOLUTION:The autonomic nervous system (ANS) is the component of the peripheral nervous system that controls cardiac muscle contraction, visceral activities, and glandular functions of the body.