(B) The diffusion membrane of the lungs is extremely thin and is composed of three major layers: $1$. The thin squamous epithelium of the alveoli. $2$

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Alveolar epithelium and capillary endothelium

(B) The diffusion membrane of the lungs is extremely thin and is composed of three major layers: $1$. The thin squamous epithelium of the alveoli. $2$. The endothelium of the alveolar capillaries. $3$. The basement substance (basement membrane) in between them. Therefore,the exchange of gases occurs through the alveolar epithelium and the capillary endothelium.

Class 11 Biology Breathing and Exchange of Gases Exchange of gases

Medium

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

AIPMT 1997 All AIPMT

A
Only alveolar epithelium
B
Alveolar epithelium and capillary endothelium
C
Alveolar epithelium,capillary endothelium,and tunica adventitia
D
Alveolar epithelium,capillary endothelium,tunica media,and a thin layer of tunica adventitia

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Class 11

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Chapter

Breathing and Exchange of Gases

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Exchange of gases

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AIPMT 1997 Paper All AIPMT years →

The given figure shows a small part of the human lung where gas exchange occurs. Identify the part $A, B, C,$ or $D$ correctly with its function from the given options.

Medium

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What is the partial pressure of $CO_2$ in the alveolar air?

Medium

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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 $III$. $40$

Medium

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The partial pressures (in $mm \ Hg$) of oxygen $(O_{2})$ and carbon dioxide $(CO_{2})$ at the alveoli (the site of diffusion) are:

MediumNEET 2021

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Which of the following is true for the exchange part of the respiratory system?

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

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

Similar Questions

The given figure shows a small part of the human lung where gas exchange occurs. Identify the part $A, B, C,$ or $D$ correctly with its function from the given options.

What is the partial pressure of $CO_2$ in the alveolar air?

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 partial pressures (in $mm \ Hg$) of oxygen $(O_{2})$ and carbon dioxide $(CO_{2})$ at the alveoli (the site of diffusion) are:

Which of the following is true for the exchange part of the respiratory system?

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Exam Paper Generator

Online Exam Module

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 $III$. $40$