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

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYBreathing and Exchange of Gases1 Mark
MCQ
$\ce{CO_2}$ dissociates from carbaminohaemoglobin when:
  • A
    $\ce{pCO_2}$ is high $\&\  \ce{pO_2}$ is low.
  • ✓
    $\ce{pO_2}$ is high and $\ce{pCO_2}$ is low.
  • C
    $\ce{pCO_2}$ and $\ce{pO_2}$ are equal.
  • D
    None of the above.
✓

Answer

Correct option: B.
$\ce{pO_2}$ is high and $\ce{pCO_2}$ is low.
In alveoli, pcoz is low and $\ce{pO_2}$ is high. Due to this $\ce{CO_2}$ dissociates from haemoglobin.

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