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Breathing and Exchange of Gases — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYBreathing and Exchange of Gases3 Marks
Question
What is the effect of $\mathrm{pCO}_2$ on oxygen transport?
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Answer

  • $\mathrm{pCO}_2$ plays an important role in oxygen transport.
  • In the alveoli, because of low $\mathrm{pCO}_2$, oxygen binds with haemoglobin resulting in the formation of oxyhaemoglobin.
  • In tissues, high $\mathrm{pCO}_2$ facilitates the dissociation of oxyhaemoglobin.
  • $\mathrm{O}_2$ gets bound to haemoglobin at the lung surface where $\mathrm{pCO}_2$ is low and dissociates at the tissues where $\mathrm{pCO}_2$ is high.

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