$C O_{2}$ dissociates from carbamino-haemoglobin when:

p C O_{2} is high and p O_{2} is low

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p O_{2} is high and p C O_{2} is low

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p C O_{2} and p O_{2} are equal

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None of the above

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Solution

The correct option is B $p O_{2} is high and p C O_{2} is low$
When the $p C O_{2}$ is low and $p O_{2}$ is high as in the lung alveoli, dissociation of $C O_{2}$ from carbamino-haemoglobin takes place. $C O_{2}$ which is bound to haemoglobin from the tissue is delivered at the alveoli.

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$C O_{2}$ dissociates from carbamino haemoglobin when

(a) $p C O_{2}$ is high and $p O_{2}$ is low

(b) $p O_{2}$ is high and $p C O_{2}$ is low

(d) None of the above

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