AIPMT PRELIMS 2010 Zoology Transport of Gases MCQ Question
What is true about RBCs in humans?
They do not carry CO₂ at all
They carry about 20-25 percent of CO₂
They transport 99.5 percent of O₂
They transport about 80 percent oxygen only and the rest 20 percent of it is transported in dissolved state in blood plasma
Correct Answer
Detailed Explanation
About 97 percent of O₂ is transported by RBCs in the blood. The remaining 3 percent of O₂ is carried in dissolved state through the plasma. Nearly 20-25 percent of CO₂ is transported by RBCs, whereas, 70 percent of it is carried as bicarbonates.
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