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

Options

A. They carry about `20-25` percent of `CO_(2)`.
B. They transport `99.5` percent of `O_(2)`
C. They transpart about `80` per cent oxygen only and the rest `20` percent of it is transported in dissolved state in blood plasma.
D. They do not carry `CO_(2)` at all.

Answer

A

Explanation

Nearly `20-25%` of `CO_(2)` is transported by `RBCs` whereas `70%` of it is carried as bicarbonate. About `7%` of `CO_(2)` is carried in a dissolved state through plasma. About `97%` of `O_(2)` is carried by `RBCs` in the blood. About `3%` of `O_(2)` is transported in a dissolved state through the plasma.