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If the walls of alveoli become thick what will happen to gas exchange?

Answer and explanation

Correct answer: Gas exchange will become slower

Alveoli are adapted for rapid diffusion because they have very thin walls, a moist surface, and a rich capillary supply. Thickening the alveolar wall increases the distance that oxygen and carbon dioxide must cross, so diffusion becomes slower and less efficient. Consequently, less oxygen may enter the blood in a given time. Therefore option A is correct; the other effects do not follow from wall thickening.

Related tags

AlveoliGas ExchangeDiffusionLife ProcessesWorld Of LivingScienceClass 10 Mcq

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