Class 11 NEET Biology Breathing and Exchange of Gases

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Question : 36 of 65

Marks: +1, -0

A large proportion of oxygen remains unused in the human blood even after its uptake by the body tissues. This O2

(2011)

acts as a reserve during muscular exercise
raises the pCO2 of blood to 75mm of Hg.
is enough to keep oxyhaemoglobin saturation at 96%
helps in releasing more O2 to the epithelial tissues

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