The correct sequence of events from the production of CO₂ in a tissue cell to its…

Biology · NEET · NTA ExamsBreathing and Exchange of Gases

The correct sequence of events from the production of CO₂ in a tissue cell to its exhalation is:

I. Transport of \(\mathrm{HCO}_{3}^{-}\) in plasma to lungs.
II. Diffusion of CO₂ from tissue cell into blood.
III. Conversion of CO₂ to \(\mathrm{HCO}_{3}^{-}\) and H⁺ in RBC.
IV. Conversion of \(\mathrm{HCO}_{3}^{-}\) back to CO₂ in pulmonary capillaries.
V. Exhalation of CO₂ from alveoli.

Choose the correct option from the following:

  1. II → I → III → IV → V
  2. II → III → I → IV → V
  3. III → II → I → V → IV
  4. I → III → II → IV → V

Answer

(B) II → III → I → IV → V

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