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What would happen if human blood becomes acidic ?

  • A.The oxygen-carrying capacity of haemoglobin decreases
  • B.The oxygen-carrying capacity of haemoglobin increases
  • C.Will be unpredictable
  • D.Will be same

Answer: A

If blood becomes acidic, the oxygen-carrying capacity of haemoglobin decreases.

This is the Bohr effect: a fall in pH shifts the oxygen dissociation curve to the right, so haemoglobin releases oxygen more readily and binds it less. It is useful in the tissues, but in acidosis it means the lungs load less oxygen too.

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