Respiration in PlantsMedium

Question

In humans, respiration occurs in the following steps. Arrange these steps in the correct order.

A. Diffusion of $O_{2}$ and ${CO}_{2}$ between blood and tissues

B. Diffusion of $O_{2}$ and ${CO}_{2}$ across alveolar membrane

C. Pulmonary ventilation by which atmospheric air is drawn in and ${CO}_{2}$ rich alveolar air is released out

D. Cellular respiration

E. Transport of gases by the blood

Choose the correct answer from the options given below

Options

A.A, B, C, D, E
B.E, A, C, D, B
C.C, B, E, A, D
D.C, A, B, E, D

Solution

Sol. [Key Concept: Correct sequence of steps of respiration]

Respiration involves the following steps:

(i) Breathing or pulmonary ventilation by which atmospheric air is drawn in and ${CO}_{2}$ rich alveolar air is released out.

(ii) Diffusion of gases across alveolar membrane.

(iii) Transport of gases by the blood

(iv) Diffusion of $O_{2}$ and ${CO}_{2}$ between blood and tissues

(v) Utilization of $O_{2}$ by the cells for catabolic reactions and resultant release of ${CO}_{2}$

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