A majority of carbon dioxide in the body is transported as:
A) bicarbonate ion.
B) hydrogen ion.
C) hemoglobin.
D) plasma.

Question

Quizplus · Accepted Answer

Carbon dioxide is carried in the blood in three ways: as dissolved gas, bound to hemoglobin, and as bicarbonate ion (HCO3-). Of these, the majority is in the form of bicarbonate ion, which is formed when carbon dioxide reacts with water in the blood to form carbonic acid. The carbonic acid then dissociates into bicarbonate ion and hydrogen ion, with the bicarbonate ion being transported in the plasma.

A Majority of Carbon Dioxide in the Body Is Transported