The partial pressures (in mmHg ) of oxygen ( O _ 2 ) and carbon dioxide ( CO _ 2 ) at alveoli (the site of diffusion) are:

Correct answer: A. p O _ 2 = 104 and pC O _ 2 = 40 Partial pressures (in mmHg ) of O _ 2 and CO _ 2 at different sites of the body and in the atmosphere: Respiratory Gases Atmospheric pressure Alveoli Oxygenated Blood Deoxygenated Blood Tissues O _ 2 159 104 95 40 40 CO _ 2 0 . 3 40 40 45 45

NEET 2021

Exam: NEET
Year: 2021
Subject: Zoology
Chapter: Breathing and Exchange of Gases

NEET 2021 · Zoology · Breathing and Exchange of Gases

The partial pressures (in mmHg ) of oxygen ( O _ 2 ) and carbon...

The partial pressures (in

mmHg

) of oxygen \left({O}_{2}\right)

and carbon dioxide \left({CO}_{2}\right)

at alveoli (the site of diffusion) are:

Options

A $p{O}_{2} = 104$ and $pC{O}_{2} = 40$
B $p{O}_{2} = 40$ and $pC{O}_{2} = 45$
C $p{O}_{2} = 95$ and $pC{O}_{2} = 40$
D $p{O}_{2} = 159$ and $pC{O}_{2} = 0 . 3$

Correct answer

A. $p{O}_{2} = 104$ and $pC{O}_{2} = 40$

Step-by-step solution

Partial pressures (in $mmHg$ ) $of {O}_{2}$ and ${CO}_{2}$ at different sites of the body and in the atmosphere:

Respiratory Gases	Atmospheric pressure	Alveoli	Oxygenated Blood	Deoxygenated Blood	Tissues
${O}_{2}$	$159$	$104$	$95$	$40$	$40$
${CO}_{2}$	$0 . 3$	$40$	$40$	$45$	$45$

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