Why are a very large number of alveoli presen | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The alveoli are the primary sites of gas exchange in the lungs. They are numerous and spherical in shape,which significantly increases the total s

Vedclass · Accepted Answer

To provide a large surface area for diffusion

Vedclass · Answer

(B) The alveoli are the primary sites of gas exchange in the lungs. They are numerous and spherical in shape,which significantly increases the total surface area available for the diffusion of gases ($O_2$ and $CO_2$). According to Fick's law of diffusion,the rate of gas exchange is directly proportional to the surface area of the membrane. Therefore,a large number of alveoli ensure efficient and rapid exchange of gases between the blood and the atmosphere.

Column-$I$	Column-$II$
$A$. Alveoli	$i$. $0.3 \ mmHg \ PCO_2$
$B$. Deoxygenated blood	$ii$. $45 \ mmHg \ PCO_2$
$C$. Atmospheric air	$iii$. $104 \ mmHg \ PO_2$
$D$. Tissue	$iv$. $40 \ mmHg \ PO_2$

Why are a very large number of alveoli present in the lungs?

Similar Questions

Maximum amount of oxygen is lost from the blood in the

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

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

Exchange of gases in man takes place at the level of

Vedclass Test Series

Exam Paper Generator

Online Exam Module