Which are the three main layers that form the diffusion membrane?

  • A
    Thin squamous epithelium of alveoli,basement membrane of bronchioles and basement substance
  • B
    Thin squamous epithelium of alveoli,endothelium of alveolar capillaries and the basement substance
  • C
    Basement substance,cuboidal epithelium of alveoli and stratified epithelium of bronchiole
  • D
    Ciliated epithelium of trachea,endothelium of capillaries and basement substance

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Similar Questions

What is the percentage of oxygen in expired air (in $\%$)?

The $pCO_2$ of inspired air is . . . . . . $mm \ Hg$ during external respiration.

The number of $RBC$ in a man increases if he lives at a higher altitude because:

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$III$. $40$

In lungs,the air is separated from the venous blood through:

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