Q

During each breathing cycle, when air is taken in and thrown out, the lungs always contain some amount of air so that there is sufficient time for oxygen to be absorbed and carbon dioxide to be released. What is this amount of air called?

RRB Group-D 05/09/2022 (Shift-II) 2022
✓ Answer: D Residual volume
The source answer is residual volume. Strictly, residual volume is the air remaining after maximal forced expiration; air remaining after normal expiration is functional residual capacity.
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