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.
Frequently asked questions
What is the correct answer to this question?
Gas exchange will become slower
Why is this the correct answer?
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.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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