If one holds their breath after expiration fo | vedclass

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(A) Yes, gas exchange continues.According to $Henry's 	ext{ law}$, the amount of gas dissolved in a liquid is proportional to the partial pressure of

Vedclass · Accepted Answer

Yes, gas exchange continues due to the partial pressure gradient between blood and alveolar air.

Vedclass · Answer

(A) Yes, gas exchange continues.According to $Henry's 	ext{ law}$, the amount of gas dissolved in a liquid is proportional to the partial pressure of the gas above the liquid.Even after expiration, the lungs contain residual volume, and the blood continues to circulate through the pulmonary capillaries.Oxygen $(O_2)$ continues to diffuse from the alveoli into the blood, while carbon dioxide $(CO_2)$ diffuses from the blood into the alveoli, following their respective partial pressure gradients.This exchange persists until the partial pressures in the blood and the alveolar air reach equilibrium or until the next breath is taken.As $O_2$ levels drop and $CO_2$ levels rise in the blood, the respiratory centers in the $medulla 	ext{ oblongata}$ are stimulated, creating an urge to breathe.

If one holds their breath after expiration for about $30 \text{ s}$, would there still be any exchange of respiratory gases in the lungs during this period? Explain.

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