ANSWER: C.Oxygenation
SOLUTION : The main function of your respiratory system is to pull in oxygen for your body’s cells and get rid of carbon dioxide, a waste product. You do this by breathing in and out and through gas exchange between the small air sacs of your lungs (alveoli) and the blood vessels running nearby.

ANSWER: A.Epiglottis
SOLUTION:Epiglottis is a tiny flap of cartilaginous tissue attached to the entrance of the larynx, and covers it during swallowing, to prevent the entry of food into the air tract.

ANSWER :B.Alveoli
SOLUTION:Gas exchange occurs in the respiratory zone of the lung, where alveoli are present. The respiratory zone of the lung includes respiratory bronchioles, alveolar ducts, alveolar sacs, and alveoli.

ANSWER: C.Filtration of Air
SOLUTION: Cilia are specialized organelles that provide the force necessary to transport foreign materials in the respiratory tract toward the mouth where they can be swallowed or expectorated.

ANSWER: B.Diaphragm
SOLUTION:The diaphragm, a dome-shaped sheet of muscle that separates the chest cavity from the abdomen, is the most important muscle used for breathing in (called inhalation or inspiration). The diaphragm is attached to the base of the sternum, the lower parts of the rib cage, and the spine.

ANSWER: A.Oxygen
SOLUTION: The protein hemoglobin is a molecule which is responsible for carrying almost all of the oxygen in the blood. It is composed of four subunits, each with a heme group plus a globin chain.

ANSWER:B.Exhalation
SOLUTION:The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation).

ANSWER: B. Asthma
SOLUTION: Asthma is a major noncommunicable disease (NCD), affecting both children and adults, and is the most common chronic disease among children. Inflammation and narrowing of the small airways in the lungs cause asthma symptoms, which can be any combination of cough, wheeze, shortness of breath and chest tightness.

ANSWER:B.Preventing collapse
SOLUTION: It is established that pulmonary surfactant reduces surface tension at the air–water interface in the alveoli, thereby preventing collapse of these structures at end-expiration. In this manner, surfactant reduces the work associated with breathing.

ANSWER: A.Lungs
SOLUTION: It annually presents the reports based on the working of the safeguards to the President. If any of those reports relate to any matter which is concerned with the State Government, a copy of that report is forwarded to the State Government.