Carbon dioxide is primarily transported: Group of answer choicesbound with hemoglobin at the hemein the form of bicarbonatesimply dissolved in plasmabound with plasma proteins

Carbon dioxide is primarily transported in the form of bicarbonate. Here's a step-by-step explanation:

1. Carbon dioxide (CO2) is produced as a waste product in cells during cellular respiration, which is the process of generating energy from glucose.

2. This CO2 diffuses out of the cells and into the capillaries, where it enters the red blood cells.

3. Inside the red blood cells, an enzyme called carbonic anhydrase catalyzes a reaction between CO2 and water (H2O) to form carbonic acid (H2CO3).

4. Carbonic acid is unstable in the blood and dissociates into a bicarbonate ion (HCO3-) and a hydrogen ion (H+).

5. The bicarbonate ions diffuse out of the red blood cells and into the plasma, where they are transported to the lungs. This is how the majority of CO2 (about 70%) is transported in the blood.

6. In the lungs, the process is reversed: bicarbonate ions are converted back into CO2, which is exhaled.

So, while some CO2 is indeed carried dissolved in plasma or bound with hemoglobin or plasma proteins, the primary method of CO2 transport in the blood is in the form of bicarbonate ions.