Which buffer controls the pH of blood? A)CH₃COOH and CH₃COO^- B)H₂CO₃ and HCO₃- C)NH₄⁺ and NH₃ D)H₃PO₄ and H₂PO₄^-

Question

Quizplus · Accepted Answer

The buffer system that controls the pH of blood is the bicarbonate buffer system, which consists of carbonic acid (H2CO3) and bicarbonate ions (HCO3-). Option B contains the correct components of this buffer system - HCO3- (bicarbonate ions) and H2CO3 (formed from CO2 and H2O) and their conjugate acid-base pairs. Option A contains carboxylic acids and their conjugate bases, which are not components of the bicarbonate buffer system. Option C contains sulfonic acid and amine groups which are not involved in the bicarbonate buffer system. Option D contains phosphate groups and their conjugate forms, which are components of another buffer system found in the body, but not the bicarbonate buffer system.

Which Buffer Controls the PH of Blood