Question

Choose the correct statement about human RBC.

• A. They carry about 20-25 percent of $C{O}_2$.
• B. They transport about 80% oxygen and the rest 20% is transported in dissolved state in plasma.
• C. They transport 99.5% oxygen.
• D. They do not carry CO2 at all.

Answer 1

The correct option is A

They carry about 20-25 percent of $C{O}_2$.

About 70% of $C{O}_2$ is transported as bicarbonates. 23% of $C{O}_2$ is combined with haemoglobin and transported as carbaminohaemoglobin. 7% of $C{O}_2$ gets dissolved and transported through plasma.