<prompt> Most of the CO2 transported in the blood isDissolved in plasma.In carbamino compounds formed from plasma proteins.In carbamino compounds formed from hemoglobin.In HCO3  <response>: The CO2 that diffuses into red blood cells is rapidly hydrated to H2CO3 because of the presence of carbonic anhydrase.The H2CO3 dissociates to H and HCO3-, and the H is buffered, primarily by hemoglobin, while the HCO3- enters the plasma. 