CO2 is carried in the blood________________?
Correct answer: D. All of the above
- A. In combination with hemoglobin
- B. In physical solution in plasma
- C. In combination with plasma proteins
- D. All of the above
Explanation
Carbon dioxide is transported dissolved in plasma, bound to hemoglobin or other proteins as carbamino compounds, and mainly as bicarbonate. Since each listed form represents a real transport form, all of the above is the best option.
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