If a person holds their breath after expirati | vedclass

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Question

(D) Yes, there will be an exchange of respiratory gases.Even after a forceful expiration, the lungs are not completely empty.There is a volume of air

Vedclass · Accepted Answer

Yes, because of the presence of residual volume in the lungs.

Vedclass · Answer

(D) Yes, there will be an exchange of respiratory gases.Even after a forceful expiration, the lungs are not completely empty.There is a volume of air that remains in the lungs, known as the $Residual \ Volume$ $(RV)$, which is approximately $1200 \ mL$.This residual air contains oxygen and allows for the continued diffusion of gases across the alveolar-capillary membrane for a short duration.Therefore, gas exchange continues until the partial pressure gradient is no longer sufficient to support diffusion.

If a person holds their breath after expiration for about $25 \ s$, would there be an occurrence of any exchange of respiratory gases in the lungs during this period? Explain.

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