Question

The majority of carbon dioxide produced by actively metabolising tissue is transported to the lungs as bicarbonates. This constitutes % of total CO2 transported.

Select the option that fills the blank correctly.

7%

70%

77%

3%​

Answer 1

Explanation:

The majority of carbon dioxide is transported as part of the bicarbonate system. Carbon dioxide diffuses into red blood cells. Inside, carbonic anhydrase converts carbon dioxide into carbonic acid (H2CO3), which is subsequently hydrolyzed into bicarbonate (HCO−3) and H+.