Question

Given below is a list of different steps $(i-vi)$ involved in respiration. (i) Utilisation of $O_2$ by the cells for catabolic reactions. (ii) Transport of gases by the blood. (iii) Pulmonary ventilation by which atmospheric air is drawn in and $CO_2$ is released out. (iv) Release of resultant $CO_2$. (v) Diffusion of $O_2$ and $CO_2$ between blood and tissues. (vi) Diffusion of gases ($O_2$ and $CO_2$) across alveolar tissues. Select an option which has correct sequence of all the steps.

• A. $(iii), (vi), (ii), (v), (i), (iv)$
• B. $(iii), (vi), (i), (v), (ii), (iv)$
• C. $(iv), (ii), (v), (iii), (i), (vi)$
• D. $(iv), (vi), (ii), (v), (i), (iii)$

Answer 1

Answer: (A)

$(iii), (vi), (ii), (v), (i), (iv)$

Answer 2

Answer (a) $(iii), (vi), (ii), (v), (i), (iv)$