Bulk of carbon dioxide (CO_2) released from body tissues into the blood is present as

NEET 2011 Biology question

Bulk of carbon dioxide (CO) released from body tissues into the blood is present as

(1)bicarbonate in blood plasma and RBCsCorrect
(2)Free CO in blood plasma
(3)70% carbamino- haemogolobin and 30% as bicarbonate
(4)Carbamino-haemoglobin in RBCs

Answer: (1)

Solution

CO is carried by blood in three forms (NCERT): about 70% as bicarbonate (, formed in RBCs by carbonic anhydrase and carried in RBCs and plasma as KHCO and NaHCO), about 20-25% as carbamino-haemoglobin in RBCs, and about 7% dissolved in

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Question ID VK-090719