MEDICAL
LUNGS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following are features of the alveoli that adapt them to gas exchange?I. High surface areaII. Thin wallsIII. Close to the skin
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I and II only
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I only
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II and III
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I, II and III
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Explanation:
Detailed explanation-1: -What are the features of alveolar epithelium which allow efficient gas exchange? The alveolar epithelium is very thin, just one cell layer thick. This means the diffustion distance is small, therefore diffusion of gases occurs rapidly.
Detailed explanation-2: -They have a large surface area relative to the volume of the organism. They are thin and so have a short diffusion pathway. They have a moist surface where gases can dissolve first before they diffuse in or out. More items
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