How is most carbon dioxide carried in the blood?
A) Attached to oxygen
B) In the form of bicarbonate
C) Combined with albumin
D) Dissolved in the plasma

Question

Quizplus · Accepted Answer

Carbon dioxide is carried in the blood mostly in the form of bicarbonate, which is produced by the reaction of carbon dioxide with water in the presence of an enzyme called carbonic anhydrase. This bicarbonate then enters the plasma and is transported to the lungs, where it is converted back into carbon dioxide and exhaled. Some of the carbon dioxide is also carried by red blood cells and bound to hemoglobin.

How Is Most Carbon Dioxide Carried in the Blood