ANIMAL PHYSIOLOGY
GAS EXCHANGE IN HUMANS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of these is NOT a suitable characteristic for a gaseous exchange surface.
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moist
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small surface area
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thin
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well supplied with blood vessels
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Explanation:
Detailed explanation-1: -So, the correct option is ‘thick walls’.
Detailed explanation-2: -Efficient gas exchange systems must: have a large surface area to volume ratio • be thin • have mechanisms for maintaining steep concentration gradients across themselves • be permeable to gases.
Detailed explanation-3: -Thin walls, a moist inner surface, a large combined surface area, and a rich blood supply are all characteristics of a respiratory surface. Each alveolus is surrounded by capillaries.
Detailed explanation-4: -But if an organism possesses a dry or thick surface then it is not possible or hard to respire. Hence, the correct option is D.
There is 1 question to complete.