Carbon dioxide dissociates from carbaminohaemoglobin when

pCO2 is high and pO2 is low.

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pO2 is high and pCO2 is low

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pCO2 and pO2 are equal

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None of the above.

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Solution

The correct option is B
pO2 is high and pCO2 is low

When partial pressure of carbon dioxide is high and that of oxygen is low as in the tissues, more binding of carbon dioxide occurs, whereas, when the partial pressure of carbon dioxide is low and that of oxygen is high, as in the alveoli, dissociation of carbon dioxide from carbaminohaemoglobin takes place, i.e., carbon dioxide which is bound to haemoglobin from the tissues is delivered at the alveoli.

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Similar questions

$C O_{2}$ 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

C O_{2}

What will be the pO₂ and pCO₂ in the atmospheric air compared to those in the alveolar air?

(i) pO₂ lesser, pCO₂ higher

(ii) pO₂ higher, pCO₂ lesser

(iii) pO₂ higher, pCO₂ higher

(iv) pO₂ lesser, pCO₂ lesser

C O_{2}

P_{c o_{2}}

P_{o_{2}}

P o_{2}

P c o_{2}

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