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Blood Vessels

The combinati...

Question

The combination of $O_{2}$ with hemoglobin can be increased mostly by

A

Increasing

O_{2}

concentration in air

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B

Decreasing

O_{2}

concentration in blood

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C

Increasing

C O_{2}

concentration in air

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D

Decreasing

C O_{2}

concentration in blood

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Solution

The correct option is A Increasing $O_{2}$ concentration in air
The haemoglobin in blood combines with oxygen in the lungs, precisely in the alveolar sacs. If the concentration of oxygen is high in the atmospheric air, it will be high in the air that was breathed in by the lungs and would consequently increase the amount of oxygen that binds with haemoglobin.
So, the correct answer is 'Increasing O2 concentration in the air'.

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