The exchange of gases in the alveoli of the l | vedclass

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Question

(A) The exchange of gases ($O_2$ and $CO_2$) between the alveoli and the blood in the pulmonary capillaries occurs primarily through the process of si

Vedclass · Accepted Answer

Simple diffusion

Vedclass · Answer

(A) The exchange of gases ($O_2$ and $CO_2$) between the alveoli and the blood in the pulmonary capillaries occurs primarily through the process of simple diffusion.This process is driven by the partial pressure gradients of the gases.Oxygen moves from the alveoli (higher partial pressure) into the blood (lower partial pressure),while carbon dioxide moves from the blood (higher partial pressure) into the alveoli (lower partial pressure).Simple diffusion is a passive process that does not require metabolic energy.

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 by .............

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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 $III$. $40$

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