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

Question

Quizplus · Accepted Answer

The mixture of carbonic acid and bicarbonate ion acts as an important buffer in the blood by controlling pH changes. Carbonic acid can dissociate into bicarbonate ion and H+ ion or it can combine with H+ ion to form carbon dioxide and water. This helps to regulate the pH of the blood by balancing the levels of acid and base. The other options are not the main buffer in the blood.

An Important Buffer in the Blood Is a Mixture of