Which of the following statement is true about RBCs in humans?

Options

A. They transport 99.5% of `O_(2)`
B. They transport 80% oxygen, the rest 20%being transport by plasma
C. They do not carry `CO_(2)` at all.
D. They carry 20-25% of `CO_(2)`

Answer

D

Explanation

Blood is the medium of transport for `O_(2)" and "CO_(2)`.
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 a dissolved state through the plasma.
Nearly 20-25 per cent of `CO_(2)` is transported by RBC8 whereas 70 per cent of it is carried as bicarbonate (Sodium bicarbonate). About 7 per cent of `CO_(2)` is carried in a dissolved state through plasma.