Approximately seventy percent of carbon dioxide absorbed by the blood will be transported to the lungs

Options

A. as bicarbonate ions
B. in the form of dissolved gas molecules
C. by binding to RBC
D. as carbaminohaemoglobin

Answer

A

Explanation

The largest fraction of carbon dioxide, i.e, about 70% is converted to bicarbonates ` (HCO_(3)^(-))` and transported in the plasma , in the presence of enzyme carbonic anhydrase.
`CO_(2)+H_(2)O overset("Carbonic")underset(" anlydrase")hArrunderset(("Carbonic acid"))(H_(2)CO_(3))underset("anlydrase")overset("Carbonic")hArr underset(("Bicarbonate ion"))(HCO_(3)^(-)+H^(+))`