The maximum amount of oxygen which normal human blood absorbs and carries at sea level is ________ per 100 ml of blood.
Correct answer: B. 20 ml
- A. 10 ml
- B. 20 ml
- C. 30 ml
- D. 40 ml
Explanation
Each 100 ml of normal arterial blood carries about 20 ml of oxygen, mainly bound to haemoglobin and a small amount dissolved in plasma. Students may choose 10 ml because they count only dissolved oxygen and ignore the much larger haemoglobin-bound component.
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