1. Tardigrade
  2. Question
  3. Biology
  4. Read the given statements and select the correct option. Statement 1: About 70 % of CO2 that enters RBCs changes into HCO-3 for transport in plasma to the lungs where it reconverts into CO2 for elimination. Statement 2: About 40 % of CO2 that enters RBCs changes into carbaminohaemoglobin which releases O2 in the lungs.

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Q. Read the given statements and select the correct option.
Statement 1 : About $70\%$ of $CO_2$ that enters $RBCs$ changes into $HCO^-_3$ for transport in plasma to the lungs where it reconverts into $CO_2$ for elimination.
Statement 2 : About $40\%$ of $CO_2$ that enters $RBCs$ changes into carbaminohaemoglobin which releases $O_2$ in the lungs.

Breathing and Exchange of Gases

Solution:

About $20-25\%$ of $CO_2$ is carried by $Hb$ as carbamino-haemoglobin. $CO_2$ reacts directly with amine radicals $(NH_2)$ of $Hb$ to form an unstable compound called carbaminohaemoglobin which releases $CO_2$ in the lungs.