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STD 11 - 14. Breathing and exchange in gases — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 14. Breathing and exchange in gases1 Mark
MCQ
Reduction in $pH$ of blood will
  • ✓
    decrease the affinity of haemoglobin with oxygen
  • B
    release bicarbonate ions by the liver
  • C
    reduce the rate of heart beat
  • D
    reduce the blood supply to the brain.
✓

Answer

Correct option: A.
decrease the affinity of haemoglobin with oxygen
a
(a) : Reduction in $pH$ of blood causes oxygen­ haemoglobin dissociation curve to shift to right which indicates dissociation of oxygen from haemoglobin. This decreases affinity of haemoglobin for oxygen.

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