A large proportion of oxygen remains unused in the human blood even after its uptake by the body tissues. This oxygen

acts as a reserve during muscular exercise

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raises the p

{C O}_{2}

of blood to 75 mm of Hg

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is enough to keep oxyhaemoglobin saturation at 96%

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helps in releasing more

O_{2}

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Solution

The correct option is A acts as a reserve during muscular exercise
Even after the uptake of oxygen by the body tissues, a large proportion of oxygen remains unused in the human blood. This oxygen acts as a reserve during muscular exercise.

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Q. In a resting person, oxygen saturation of haemoglobin as blood leaves the tissue capillaries is?

(a) Name the blood vessel that brings oxygenated blood to the human heart.
(b) Which chamber of the human heart receives deoxygenated blood?
(c) Describe the process by which deoxygenated blood from this chamber is sent to all parts of the body.

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A large proportion of oxygen remains unused in the human blood even after its uptake by the body tissues. This oxygen

The correct option is A acts as a reserve during muscular exerciseEven after the uptake of oxygen by the body tissues, a large proportion of oxygen remains unused in the human blood. This oxygen acts as a reserve during muscular exercise.

The correct option is A acts as a reserve during muscular exercise
Even after the uptake of oxygen by the body tissues, a large proportion of oxygen remains unused in the human blood. This oxygen acts as a reserve during muscular exercise.