Arrange the following steps of respiration properly:1. Breathing or pulmonary ventilation by which atmospheric air is drawn in and CO2 2. Diffusion of gases (O2 and CO2) across the alveolar membrane.3. Transport of gases by the blood4. Diffusion of O2 and CO2 between blood and tissues.5. Utilization of O2, by the cells for catabolic reactions and resultant of CO2
Correct answer: C. 5,4,3,1,2
- A. 1,2,3,4,5
- B. 1,3,2,5,4
- C. 5,4,3,1,2
- D. 3,4,5,2,1
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About Respiration
The human respiratory system includes the air passages, lungs, alveoli and breathing muscles, while gaseous exchange explains how oxygen enters blood and carbon dioxide leaves it by diffusion. The effects of smoking include damage to cilia and alveoli, reduced gas exchange, chronic bronchitis, emphysema and increased risk of lung cancer.
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