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NEET2011ZoologyBody Fluids and CirculationActual

Bulk of carbon dioxide ( CO ₂ ) released from body tissues into the blood is present as

Options

  1. Abicarbonate in blood plasma and RBCs
  2. Bfree CO ₂ in blood plasma
  3. C70 % carbamino-haemoglobin and 30 % as bicarbonate
  4. Dcarbamino-haemoglobin in RBCs

Correct answer

A. bicarbonate in blood plasma and RBCs

Step-by-step solution

70-75 % of CO ₂ is transported as sodium bicarbonate ( NaHCO ₃ ) by plasma, and as potassium bicarbonate ( KHCO ₃ ) by RBCs.

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