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HardZoologyBreathing and Exchange of Gases
+4 / -1
The steps of respiration are: 1. Diffusion of gases across alveolar membrane 2. Transport of gases by blood 3. Diffusion of O2 and CO2 between blood and tissues 4. Utilization of O2 by cells for catabolic reactions 5. Pulmonary ventilation (breathing) The correct sequence is:
A
5 -> 1 -> 2 -> 3 -> 4
B
1 -> 2 -> 3 -> 4 -> 5
C
5 -> 2 -> 1 -> 3 -> 4
D
4 -> 3 -> 2 -> 1 -> 5
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Which of the following is incorrect about human lungs?

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Movement of air into and out of the lungs is carried out by a pressure gradient

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