Percentage of CO2 carried by plasma proteins is:
Correct answer: C. 7%
- A. 5%
- B. 6%
- C. 7%
- D. 8%
Explanation
Carbon dioxide (CO2) is transported in the blood in three main forms. Approximately 7% of CO2 is transported bound to plasma proteins, which is a minor but significant component of CO2 transport. The majority of CO2 (about 70%) is converted to bicarbonate ions in the plasma, while around 20% is carried by hemoglobin as carbaminohemoglobin. Therefore, option C is correct. Options A, B, and D are incorrect because they either underestimate or overestimate the percentage of CO2 carried by plasma proteins.
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