The amount of oxygen in exhaled air is _.
Correct answer: B. 16%
- A. 21%
- B. 16%
- C. 79%
- D. 4%
Explanation
The amount of oxygen in exhaled air is 16% whereas in inhaled air it is 21% as the body absorbs oxygen for aerobic respiration to occur.
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About Gaseous Exchange in Lungs
Gaseous exchange in the lungs occurs across the thin, moist alveolar and capillary surfaces, where oxygen and carbon dioxide diffuse down partial pressure gradients. The topic covers alveolar adaptations, ventilation, the role of haemoglobin in oxygen transport, carbon dioxide carriage, and the difference between external gas exchange and cellular respiration.
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More Gaseous Exchange in Lungs questions
The venous blood in tissues has carbon dioxide:
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All characteristics of Hemoglobin EXCEPT:
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