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Question

Reduction in pH of blood will:

A
Reduce the rate of heart beat
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B
Reduce the blood supply to the brain
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C
Decrease the affinity of hemoglobin with oxygen
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D
Release bicarbonate ions by the liver
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Solution

The correct option is C Decrease the affinity of hemoglobin with oxygen
The pH of blood reduces in the presence of carbon dioxide because carbon dioxide reacts with water to form carbonic acid. Upon increase in carbon dioxide, the pH of blood reduces, resulting in hemoglobin proteins releasing their load of oxygen. Hence, it decreases the affinity of hemoglobin with oxygen.

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