Question

Under normal condition 100 ml blood carry

• A. 4 ml $C{O}_2$
• B. 10 ml $C{O}_2$
• C. 1.34 ml $C{O}_2$
• D. 30 ml $C{O}_2$

Answer 1

The correct option is A 4 ml $C{O}_2$

Blood is the medium of transport for oxygen and carbon dioxide. About 97 per cent of oxygen is transported by RBCs in the blood. The remaining 3 per cent of oxygen is carried in a dissolved state through the plasma. Nearly 20-25 per cent of carbon dioxide is transported by RBCs whereas 70 per cent of it is carried as bicarbonate. About 7 per cent of carbon dioxide is carried in a dissolved state through plasma. Every 100 ml of deoxygenated blood delivers approximately 4 ml of CO${}_2$ to the alveoli.

Therefore, the correct answer is option A.