NEET · Biology · STD 11 - 14. Breathing and exchange in gases
In humans, respiration occurs in the following steps. Arrange these steps in the correct order.
A. Diffusion of \(O _2\) and \(CO _2\) between blood and tissues.
B. Diffusion of \(O _2\) and \(CO _2\) across alveolar membrane.
C. Pulmonary ventilation by which atmospheric air is drawn in and \(CO _2\) rich alveolar air is released out.
D. Cellular respiration.
E. Transport of gases by the blood.
Choose the correct answer from the options given below :
- A A, B, C, D, E
- B E, A, C, D, B
- C C, B, E, A, D
- D C, A, B, E, D
Answer & Solution
Correct Answer
(C) C, B, E, A, D
Step-by-step Solution
Detailed explanation
(C) C, B, E, A, D
The steps of respiration in humans occur in the following sequence:
First, pulmonary ventilation (breathing) takes place, by which atmospheric air is drawn in and \(CO_2\) rich alveolar air is released out (C).
Second, diffusion of gases ( \(O _2\) and \(CO _2\) ) occurs across the alveolar membrane (B).
Third, transport of gases is carried out by the blood (E).
Fourth, diffusion of \(O _2\) and \(CO _2\)
takes place between the blood and tissues (A).
Finally, cellular respiration occurs, where \(O_2\) is utilised by the cells for catabolic reactions and \(CO_2\) is released (D).
The correct sequence is C, B, E, A, D.
The steps of respiration in humans occur in the following sequence:
First, pulmonary ventilation (breathing) takes place, by which atmospheric air is drawn in and \(CO_2\) rich alveolar air is released out (C).
Second, diffusion of gases ( \(O _2\) and \(CO _2\) ) occurs across the alveolar membrane (B).
Third, transport of gases is carried out by the blood (E).
Fourth, diffusion of \(O _2\) and \(CO _2\)
takes place between the blood and tissues (A).
Finally, cellular respiration occurs, where \(O_2\) is utilised by the cells for catabolic reactions and \(CO_2\) is released (D).
The correct sequence is C, B, E, A, D.
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