What does carbon dioxide bind to in the red blood cells?

Question

What does carbon dioxide bind to in the red blood cells?

Answer 1

. to the hemoglobin.  hemoglobin bonds to oxygen in the lungs and carries it to the body.  it then releases the oxygen where it is needed and picks up the carbon dioxide and carries it to the lungs to be expelled.  carbon dioxide is a waste product and can be toxic to the body in excessive levels.

Answer 2

it doesn't only the oxygen binds, any carbon dioxide taken in is just put back out with the carbon dioxide your body creates.

btw, oxygen binds to hemoglobin.

Answer 3

Most (70%) of it is dissolved in the blood and not bound to anything. The rest is bound to hemoglobin.

"The majority (70%) of CO2 transported in the blood is dissolved in plasma (primarily as dissolved bicarbonate; 60%). A smaller fraction (30%) is transported in red blood cells combined with the globin portion of hemoglobin as carbaminohaemoglobin.

As CO2 diffuses into the blood stream 93% goes into RBCs and 7% is dissolved in plasma. 70% is converted into H2CO3 by carbonic anhydrase. The H2CO3 dissociates into H+ and HCO−3. The HCO−3 moves out of the RBC in exchange for CL− (chloride shift). The hydrogen is removed by buffers in the blood (Hb).

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