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Question

CO2 dissociates from carbamino-haemoglobin when:

A
pCO2 is high and pO2 is low
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B
pO2 is high and pCO2 is low
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C
pCO2 and pO2 are equal
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D
None of the above
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Solution

The correct option is B pO2 is high and pCO2 is low
When the pCO2 is low and pO2 is high as in the lung alveoli, dissociation of CO2 from carbamino-haemoglobin takes place. CO2 which is bound to haemoglobin from the tissue is delivered at the alveoli.

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