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Exchange of Gases

During inspir...

Question

During inspiration, the concentration of oxygen inside the alveoli is_______ that in blood capillaries.

A

less than

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B

more than

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C

same as

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D

more or less than

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Solution

The correct option is B
more than

During inspiration, the concentration of oxygen inside the alveoli is more than that in blood capillaries whereas the concentration of carbon dioxide in blood capillaries is more than that in alveoli. As a result, oxygen from the alveoli diffuses to the capillaries and the carbon dioxide from capillaries diffuses to the alveoli.

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