Question

Carbon dioxide is carried in the blood in 

A. Combination with the hemoglobin molecule. 

B. Combination with plasma proteins. 

C. Physical solution in plasma. 

D. Greater quantity in red blood cells than in plasma. 

E. Greater quantity as HCO₃^-  ions than as other forms.

Answer 1

A. True Attached to amino groups as carbamino hemoglobin (Hb-NH.COOH). 

B. True Attached to amino groups as carbamino protein (Pr-NHCOOH). 

C. True It is the CO₂ in solution that exerts the P_CO2 and is diffusible. 

D. False Plasma carries the greater quantity, mainly as bicarbonate. 

E. True Bicarbonate accounts for 80–90 per cent of the total CO₂ in blood.