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Question: Answered & Verified by Expert
Bulk of carbon dioxide $\left(\mathrm{CO}_2\right)$ released from body tissues into the blood is present as
BiologyBody Fluids and CirculationNEETNEET 2011 (Mains)
Options:
  • A bicarbonate in blood plasma and RBCs
  • B free $\mathrm{CO}_2$ in blood plasma
  • C $70 \%$ carbamino-haemoglobin and $30 \%$ as bicarbonate
  • D carbamino-haemoglobin in RBCs
Solution:
2995 Upvotes Verified Answer
The correct answer is: bicarbonate in blood plasma and RBCs
$70-75 \%$ of $\mathrm{CO}_2$ is transported as sodium bicarbonate $\left(\mathrm{NaHCO}_3\right)$ by plasma, and as potassium bicarbonate $\left(\mathrm{KHCO}_3\right)$ by RBCs.

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