Question

Carbon dioxide is transported from tissue to respiratory surface by only

• A. Plasma and erythrocytes
• B. Plasma
• C. Erythrocytes
• D. Erythrocytes and leucocytes

Answer 1

The correct option is A Plasma and erythrocytes

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 ions. About 7 per cent of carbon dioxide is carried in a dissolved state through plasma.