NEET2010ZoologyBody Fluids and CirculationActual
What is true about RBCs in humans?
Options
- AThey carry about 20-25 per cent of CO ₂
- BThey transport 99.5 per cent of O ₂
- CThey transport about 80 per cent oxygen only and the rest 20 per cent of it is transported in dissolved state
- DThey do not carry CO ₂ at all
Correct answer
A. They carry about 20-25 per cent of CO ₂
Step-by-step solution
Nearly 20-25 per cent of CO ₂ is transported by RBCs. It is caused by haemoglobin as carbamino haemoglobin. 70 per cent of CO ₂ is carried as bicarbonates. About 97 per cent of O ₂ is transported by RBCs in the blood. The remaining 3 per cent of O ₂ is carried in dissolved state through the plasma.