Solution
Core Logic
Respiration involves the following sequential steps: (i) Breathing or pulmonary ventilation by which atmospheric air is drawn in and CO₂ rich alveolar air is released out (C). (ii) Diffusion of gases across alveolar membrane (B). (iii) Transport of gases by the blood (E). (iv) Diffusion of O₂ and CO₂ between blood and tissues (A). (v) Utilisation of O₂ by the cells for catabolic reactions and resultant release of CO₂ (Cellular respiration) (D).
Step 1: Final Conclusion
The correct order is C arrow B arrow E arrow A arrow D.
Pattern Recognition
Follow the physical path of oxygen: Environment arrow Lungs (Ventilation) arrow Alveolar Blood (Diffusion) arrow Systemic Blood (Transport) arrow Tissues (Diffusion) arrow Mitochondria (Cellular).
Chapter Mix
Class 11 Biology: Breathing and Exchange of Gases