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Oxygen Dissociation Curve

Combination o...

Question

Combination of haemoglobin with $O_{2}$ in lungs can be promoted by

A

Increasing

C O_{2}

concentration in blood

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B

Increasing

O_{2}

concentration in blood

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C

Decreasing

O_{2}

concentration in blood

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D

Introducing

C O

in blood

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Solution

The correct option is D Increasing $O_{2}$ concentration in blood
As blood passes through the lungs, It picks up oxygen due to the increased oxygen pressure in capillaries. It releases oxygen in tissues of lower oxygen concentration. An increased oxygen concentration in the blood promotes the oxygen-hemoglobin combination in the lungs. This increased affinity is caused by a conformational change in hemoglobin molecules. Each hemoglobin can bind four oxygen molecules.
So the correct answer is 'Increasing $O_{2}$ concentration in blood'.

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