NEET Biology Breathing And Exchange Of Gases Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

Answer: (b)

Blood is the medium of transport for O₂ and CO₂ . About 97 percent of O₂ is transported by RBCs in the blood. The remaining 3 percent of O₂ is carried in a dissolved state through the plasma. Nearly 20-25 percent of CO₂ is transported by RBCs whereas 70 percent of it is carried as bicarbonate. About 7 percent of CO₂ is carried in a dissolved state through plasma.