Exchange of gases in alveoli occurs through _________ .

absorption

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dialysis

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diffusion

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anaerobic respiration

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Solution

The correct option is C diffusion
Diffusion is the movement of a substance from an area of higher concentration to an area of lower concentration. The air in alveoli contains higher concentration of oxygen. The alveoli are very close to capillaries, which has low oxygen concentration and high carbon dioxide as compared to alveolar air. Oxygen diffuses from the alveoli, into the blood in the capillaries. Similarly, carbon dioxide from the blood moves out of the capillaries into the alveoli.

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During respiration exchange of gases take place in

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Q. The exchange of gases between oxygen and carbondioxide in alveoli occurs through

Q. Which of the following statements(s) is (are) true about respiration?
(a) During respiration, ribs move inward, the diaphragm is raised.
(b) In the alveoli, exchange of gases takes place, i.e., oxygen from alveolar air diffuses into blood and carbon dioxide from the blood into the alveolar air.
(c) Haemoglobin has a greater affinity for oxygen than carbon dioxide.
(d) Alveoli increases the surface area for the exchange of gases.

Exchange of gases in alveoli occurs by the process of ________

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