NEETZoologyBreathing and Exchange of Gases
Which of the following does not occur during respiration?
Options
- ADiffusion of O₂ and CO₂ between blood and tissues
- BTransport of gases by the blood
- CUtilisation of O₂ by the cells
- DAbsorption of food
Correct answer
D. Absorption of food
Step-by-step solution
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 (O2 and CO2) 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