Which of the Following is the Dominant Method of Carbon

Question

Which of the following is the dominant method of carbon dioxide transport?
A)Bound to hemoglobin
B)Bound to oxygen
C)Dissolved in plasma as a gas
D)Dissolved in plasma as bicarbonate ions
E)Diffusion

Accepted Answer

The dominant method of carbon dioxide transport is as bicarbonate ions dissolved in plasma. Carbon dioxide reacts with water to form carbonic acid, which then dissociates into bicarbonate ions and hydrogen ions. This process occurs primarily in red blood cells due to the presence of carbonic anhydrase enzyme, and the resulting bicarbonate ions diffuse out of the red blood cells and into the plasma for transportation to the lungs for exhalation.