All of the following statements regarding the transport of carbon dioxide and molecular oxygen by hemoglobin are true EXCEPT
A) the isohydric shift is possible because deoxygenated hemoglobin is a stronger base than oxygenated hemoglobin.
B) if the tissues are using glucose only as a fuel, then the isohydric shift plus some other buffering effect of blood is necessary to prevent the pH of plasma from changing very much.
C) erythrocytes in venous blood have a lower concentration of chloride ion than when they are in the arterial system.
D) the total bicarbonate concentration in venous blood is higher than in arterial blood.
E) the PO2 and pH in venous blood tend to be lower than in arterial blood.

Question

Quizplus · Accepted Answer

The chloride shift facilitates the transport of CO2 from tissues to the lungs. When CO2 enters erythrocytes, it is converted to bicarbonate, which is then exchanged for chloride ions from the plasma. This process increases the chloride ion concentration in erythrocytes in venous blood compared to arterial blood, making statement C incorrect.

All of the Following Statements Regarding the Transport of Carbon