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Bulk of carbon dioxide (CO₂) released form body tissues into the blood is present as
Options
(a) bicarbonate in blood plasma and RBCs
(b) free CO₂ in blood plasma
(c) 70% carbamino – haemoglobin and 30% as bicarbonate
(d) carbamino – haemoglobin in RBCs
Correct Answer:
bicarbonate in blood plasma and RBCs
Explanation:
70% to 75% CO₂ is transported as primary buffer of the blood. Bicarbonate ion (HNO₃) in blood plasma. When CO₂ diffuses from tissues into blood then it is acted upon by the enzyme carbonic anhydrase.
