Question

The majority of carbon dioxide in the blood is transported by ________.

a) Hemoglobin
b) Bicarbonate ions
c) Dissolved in plasma
d) Carbonic acid

Answer 1

The majority of carbon dioxide in the blood is transported by bicarbonate ions.

Step-by-step explanation:

The majority of carbon dioxide in the blood is transported by bicarbonate ions. Carbon dioxide can be transported through the blood via three methods: dissolved directly in the blood, bound to plasma proteins or hemoglobin, or converted into bicarbonate. The majority of carbon dioxide is transported as part of the bicarbonate system. Carbon dioxide diffuses into red blood cells, where it is converted to carbonic acid, which then hydrolyzes into bicarbonate and hydrogen ions.