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Question

Gas exchanges continue uninterrupted in .......... even after a forceful expiration.

A
Blood
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B
Lungs
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C
Mitochondria
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D
None of the above
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Solution

The correct option is B Lungs
Some amount of air remains in the lungs even when the air from the lungs is expired forcefully. The air which is present in the lungs after the forceful expiration is known as the residual volume. This air allows to continue the gaseous exchange between the blood capillaries and the alveoli in the lungs after expiration.
Thus, the correct answer is option B.

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