Question

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

• A. as bicarbonate ions
• B. in the form of dissolved gas molecules
• C. by binding to RBC
• D. as carbamino-haemoglobin

Answer 1

The correct option is A as bicarbonate ions

Nearly 70% of carbon dioxide is carried by the blood as bicarbonate, 20-25% as bound to RBCs, and around 7% in a dissolved state through plasma.