What is the primary function of the hemoglobin molecule in the context of oxygen transport and the regulation of pH in the blood?

A To buffer excess hydrogen ions and maintain acid-base balance
B To transport oxygen from the lungs to peripheral tissues and facilitate carbon dioxide removal ✓
C To regulate blood pressure through vasoconstriction and vasodilation
D To synthesize glucose from lactate in red blood cells

Explanation

Hemoglobin's primary role is to bind oxygen in the lungs and release it to tissues, while also helping to remove carbon dioxide. It plays a critical role in maintaining acid-base balance by buffering excess hydrogen ions, but its primary function is oxygen transport.

Source

Guyton and Hall Textbook of Medical Physiology
Hematology Hematology: Hemoglobin and Oxygen Transport Hematology: Hemoglobin and Oxygen Transport Medium MEDICAL Confidence: high