Ascent of high mountains may cause altitude s | vedclass

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(C) At high altitudes,the atmospheric pressure decreases,which leads to a decrease in the partial pressure of oxygen $(pO_2)$.Due to this low $pO_2$ i

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Decreased partial pressure of oxygen

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(C) At high altitudes,the atmospheric pressure decreases,which leads to a decrease in the partial pressure of oxygen $(pO_2)$.Due to this low $pO_2$ in the inspired air,the oxygen diffusion into the blood in the lungs is reduced.This results in hypoxia (low oxygen supply to tissues),which manifests as symptoms of altitude sickness such as nausea,fatigue,and heart palpitations.The proportion of oxygen in the air remains constant at approximately $21\%$,but the reduced barometric pressure makes it harder for oxygen to enter the bloodstream.

Column-$I$	Column-$II$ ($PO_2$ in $mm\, Hg$)
$P$. Atmospheric air	$I$. $159$
$Q$. Tissues	$II$. $95$
$R$. Oxygenated blood	$III$. $40$

Ascent of high mountains may cause altitude sickness in men. The prime cause of this is:

Similar Questions

What are the layers encountered by $O_2$ as it passes through the diffusion membrane from the start to the end?

What is the direction of the concentration gradient for $CO_2$ and $O_2$ during gas exchange?
$CO_2$ gradient $\quad$ $O_2$ gradient

The diffusion membrane of the lungs,through which the exchange of gases occurs,is made up of which of the following layers?

Match the partial pressures of oxygen in different parts involved in diffusion compared to the atmosphere.
Column-$I$ Column-$II$ ($PO_2$ in $mm\, Hg$)
$P$. Atmospheric air $I$. $159$
$Q$. Tissues $II$. $95$
$R$. Oxygenated blood $III$. $40$

The exchange of gases in the alveoli of the lungs occurs through which process?

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