Question

Based on the direction of diffusion of
CO2 into the lungs, arrange the layers of
diffusion membrane in correct sequence
A) Alveolar epithelium B) Basement
membrane
C) Endothelium of alveolar capillaries
(A) CBA
(B) ABC
(C) ACB
(D)
CAB​

Answer 1

Answer:

of steps of respiration is:

(iii) Pulmonary ventilation by which atmospheric air is drawn in and CO2 is released out.

(vi) Diffusion of gases (O2 and CO2) across alveolar tissues.

(ii) Transport of gases by the blood.

(v) Diffusion of O2 and CO2 between blood and tissues.

(i) The utilisation of O2 by the cells for catabolic reactions.

(iv) Released resultant CO2.

So, the correct answer is '(iii), (vi), (ii), (v), (i), (iv