First slide

Transport of Gases

Question

Reduction in pH of blood will

Moderate

A

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.

Solution

Reduction in pH of blood will decrease the affinity of haemoglobin with oxygen. Reduction of pH occurs when $H^{+}$ concentration increases. When haemoglobin binds to $H^{+}$ , it unloads oxygen (Bohr effect) in the tissues, low ${pO}_{2}$ , high ${pCO}_{2}$ , high $H^{+}$ concentration (low pH) and higher temperature favour the dissociation of oxygen from the oxyhaemoglobin.

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