Why do human beings face difficulty breathing | vedclass

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Question

(D) At high altitudes,the total atmospheric pressure is lower than at sea level. Because the total atmospheric pressure is lower,the partial pressure

Vedclass · Accepted Answer

Low partial pressure of $O_{2}$

Vedclass · Answer

(D) At high altitudes,the total atmospheric pressure is lower than at sea level. Because the total atmospheric pressure is lower,the partial pressure of oxygen $(pO_{2})$ is also significantly lower. Breathing involves the diffusion of oxygen from the atmosphere into the blood,which depends on the pressure gradient. Since the partial pressure of oxygen in the atmosphere is low at high elevations,the diffusion of oxygen into the blood becomes difficult,leading to breathing difficulties.

Why do human beings face difficulty breathing at high elevations?

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