NEETZoologyBreathing and Exchange of Gases
How much CO₂ is carried as bicarbonate in the blood?
Options
- A7%
- B20-25%
- C70%
- DNone of the above
Correct answer
C. 70%
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.