Which of the following is not carried by hemoglobin
Correct answer: B. Bicarbonate
- A. Oxygen
- B. Bicarbonate
- C. Carbon diaoxide
- D. Carbon monooxide
Explanation
Bicarbonate (HCO3-) is an important molecule involved in the regulation of blood pH. Carbon dioxide (CO2) produced as a waste product in tissues diffuses into red blood cells, where it reacts with water (H2O) to form carbonic acid (H2CO3). Carbonic acid then dissociates into bicarbonate ions (HCO3-) and hydrogen ions (H+). Bicarbonate is primarily transported in the blood plasma rather than being directly carried by hemoglobin.
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