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Question

How much oxygen is delivered by 100 ml of oxygenated blood to the tissues under normal physiological conditions?

A
15 ml
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B
10 ml
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C
5 ml
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D
2.5 ml
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Solution

The correct option is B 15 ml
The exchange of gases between the external environment and the tissues is the transport of oxygen and carbon dioxide to and from the lung by the blood. Carbon dioxide is carried physically dissolved in the blood, chemically combined with blood proteins as carbamino compounds, and as bicarbonate.
Oxygen is transported both physically dissolved in the blood and chemically combined to the haemoglobin in the erythrocytes. Much more oxygen is normally transported combined with haemoglobin than is physically dissolved in the blood. 15ml of oxygen is delivered by 100ml of oxygenated blood to the tissues under normal physiological conditions.
So the correct answer is'15ml'.

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