- A 19%
- B 4%
- C 10%
- D 16%
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Answer:
D
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The concentration of oxygen in inspired air is 19.6% while the concentration of oxygen in expired air is 15.7%. Therefore, approximately 4% of the oxygen is transferred from air to the blood. Similarly, the concentration of carbon dioxide in inspired air is 0.04% and the concentration of carbon dioxide in expired air is 3.6%, so approximately 3.56% of the carbon dioxide is transferred from the blood to air.
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