NEETZoologyBreathing and Exchange of Gases
What is the amount of CO₂ transported by RBCs in the blood?
Options
- A20-25%
- B30-35%
- C40-45%
- D50-55%
Correct answer
A. 20-25%
Step-by-step solution
Blood is the medium of transport for O2 and CO2. About 97 per cent of O2 is transported by RBCs in the blood. The remaining 3 per cent of O2 is carried in a dissolved state through the plasma. Nearly 20-25 per cent of CO2 is transported by RBCs whereas 70 per cent of it is carried as bicarbonate. About 7 per cent of CO2 is carried in a dissolved state through plasma.