Question

What percentage of $C{O}_2$ is transported as $HbC{O}_2$?

• A. 42 %
• B. 10 %
• C. 70 %
• D. 50 %

Answer 1

The correct option is B 10 %

Carbaminohemoglobin or HbCO${}_2$ is a compound of hemoglobin and carbon dioxide, and is one of the forms in which carbon dioxide exists in the blood. Carbon dioxide is much more soluble in water than is oxygen, and so more dissolved carbon dioxide than dissolved oxygen is carried in blood. Even so, only a relatively small amount of blood carbon dioxide is transported in this way; only 10 percent of the carbon dioxide entering the blood remains physically dissolved in the plasma and erythrocytes. So, the correct answer is option B.