NEET 2026 Zoology Human Respiratory System MCQ Question
In humans, respiration occurs in the following steps. Arrange these steps in the correct order.
A. Diffusion of O₂ and CO₂ between blood and tissues
B. Diffusion of O₂ and CO₂ across alveolar membrane
C. Pulmonary ventilation by which atmospheric air is drawn in and CO₂ 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
A, B, C, D, E
E, A, C, D, B
C, B, E, A, D
C, A, B, E, D
Correct Answer
Detailed Explanation
Respiration involves the following steps: (i) Breathing or pulmonary ventilation by which atmospheric air is drawn in and CO₂ rich alveolar air is released out. (ii) Diffusion of gases across alveolar membrane. (iii) Transport of gases by the blood. (iv) Diffusion of O₂ and CO₂ between blood and tissues. (v) Utilisation of O₂ by the cells for catabolic reactions and resultant release of CO₂.
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