Question

How much of $C{O}_2$ is transported in blood by bicarbonate form?

• A. 88%
• B. 78%
• C. 80%
• D. 70%

Answer 1

The correct option is D

70%

The amount of $C{O}_2$ transported in bicarbonate form in blood is almost close to 70%

$C{O}_2$ is highly soluble and readily diffuses through cell membranes, moving from its site of production in the tissues into the blood.
When $C{O}_2$ dissolves in water, some of it slowly reacts with the water molecules to form carbonic acid $H_{2}C{O}_3$, some of which then dissociates into a proton $H^{+}$ and a bicarbonate ion ${HC{O}_3}^{-}$.