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Transport of Carbon Dioxide

Carbon dioxid...

Question

Carbon dioxide in the expired air is more than that in inspired air because

A

It is absorbed at the alveolar surface

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B

It is released at the alveolar surface

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C

Both A and B

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D

None of these

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Solution

The correct option is B It is released at the alveolar surface
Component Inspired air Expired air
$C O_{2}$ 0.04% 4%
This is because carbon dioxide is released at the alveolar surface during the gaseous exchange between blood and alveoli.

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