Question

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

a.

helps in releasing more oxygen to tissues

b.

raises the pCO₂ of blood to 75mm of Hg

c.

acts as a reserve during muscular exercise

d.

is enough to keep oxyhemoglobin saturation at 96%

Answer: (c).acts as a reserve during muscular exercise

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Q. A large proportion of oxygen is left unused in the human blood even after its uptake by the body tissues. This oxygen ___________

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