Which of the following species is present in the most important buffering system of human blood? A) CH₃COO⁻ B) HCO₃⁻ C) H₂PO₄⁻ D) HPO₄²⁻

Question

Quizplus · Accepted Answer

The most important buffering system in human blood is the bicarbonate buffer system, which involves the equilibrium between carbonic acid (H2CO3) and bicarbonate ions (HCO3-). The equation for this equilibrium is H2CO3 ⇌ HCO3- + H+, where carbonic acid can either dissociate into bicarbonate ions and hydrogen ions or combine with bicarbonate ions to form carbonic acid. Therefore, the correct choice is B, which represents the bicarbonate buffer system with the presence of hydrogen ions (H+) and bicarbonate ions (HCO3-).

Which of the Following Species Is Present in the Most