Steps of Respiration and Gas Exchange — NEET Biology
📚 Practice ConceptThe first step in respiration is breathing by which atmospheric air is taken in (inspiration) and the alveolar air is released out (expiration). Exchange of O₂ and CO₂ between deoxygenated blood and alveoli, transport of these gases throughout the body by blood, exchange of O₂ and CO₂ between the oxygenated blood and tissues and utilisation of O₂ by the cells (cellular respiration) are the other steps involved.
Arrange the following steps of respiration in the correct sequence 1. Diffusion of gases (O, and CO₂) across alveolar membrane. 2. Utilisation of O, by the cells for catabolic reactions and resultant release of CO 3. Breathing or pulmonary ventilation by which atmospheric air is drawn in and CO, rich alveolar air is released out. 4. Transport of gases by the blood. 5. Diffusion of O, and CO₂ between blood and tissues.
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