The {O_2} concentration in the exhaled air is | vedclass

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(C) The atmospheric air contains approximately $21\%$ of ${O_2}$.During the process of respiration,the body consumes a portion of this oxygen for cell

Vedclass · Accepted Answer

About $15\%$

Vedclass · Answer

(C) The atmospheric air contains approximately $21\%$ of ${O_2}$.During the process of respiration,the body consumes a portion of this oxygen for cellular metabolism.As a result,the exhaled air (expired air) contains a lower concentration of ${O_2}$ compared to inhaled air.Typically,exhaled air contains about $15-16\%$ of ${O_2}$ by volume.Therefore,the correct option is $C$.

Gas	Atmospheric Air	Alveoli
$O_{2}$	$159$	$A$
$CO_{2}$	$0.3$	$B$

The ${O_2}$ concentration in the exhaled air is approximately:

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