An important buffer in the blood is a mixture of
A) sodium chloride and hydrochloric acid.
B) hydrochloric acid and sodium hydroxide.
C) carbonic acid and bicarbonate ion.
D) acetic acid and bicarbonate ion.
E) acetic acid and carbonate ion.

Question

Quizplus · Accepted Answer

The buffer system in the blood involves the equilibrium between carbonic acid (H2CO3) and bicarbonate ion (HCO3-). This buffer system helps maintain the pH of the blood at a relatively constant level. A and B are incorrect because they involve strong acids and bases that would cause large pH changes if added to the blood. D and E are not the major buffer systems found in the blood.

An Important Buffer in the Blood Is a Mixture of