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Question

What will be the effect of increased concentration of CO2 in blood on normal breathing?

A
Remain unaffected
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B
Slow and shallower
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C
Deep breathing and rapidly
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D
Deep breathing end normally
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Solution

The correct option is C Deep breathing and rapidly
When concentration of C02 increases in blood, the breathing rate increase rapidly and will be deep. The effect of Increased C02 is to decrease the affinity of haemoglobin for 02. Thus, due to Bohr's effect the C02 released in respiring tissue accelerates the delivery of oxygen by faster and deeper breathing.

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