(D) The correct $ppCO_2$ of alveolar air is $40 \ mm \ Hg$,not $45 \ mm \ Hg$. Therefore,option $D$ is the incorrect statement. Oxygen and carbon diox

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$ppCO_2$ of alveolar air is $45 \ mm \ Hg$.

(D) The correct $ppCO_2$ of alveolar air is $40 \ mm \ Hg$,not $45 \ mm \ Hg$. Therefore,option $D$ is the incorrect statement. Oxygen and carbon dioxide diffuse across the alveolar membrane based on partial pressure gradients,and the membrane is highly permeable to both gases.

Class 11 Biology Breathing and Exchange of Gases Transport of gases

Easy

Select the $INCORRECT$ statement regarding the transport of respiratory gases.

MHT CET 2021 All MHT CET

A
$ppO_2$ of capillary blood is $40 \ mm \ Hg$ before oxygenation.
B
Alveolar membrane is equally permeable to oxygen and carbon dioxide.
C
Dissociation of oxyhaemoglobin into haemoglobin and oxygen is favored by low $ppCO_2$.
D
$ppCO_2$ of alveolar air is $45 \ mm \ Hg$.