A) raises the \[pC{{O}_{2}}\] of blood to 75 mm of Hg
B) is enough to keep oxyhaemoglobin
C) helps in releasing more \[{{O}_{2}}\] to the epithelial tissues
D) acts as a reserve during muscular exercises
Correct Answer: D
Solution :
The tissues in our body are able to utilise only \[25%\] of \[{{O}_{2}}\] carried by arterial blood. The venous blood is still 75% saturated with \[{{O}_{2}}\]. This \[{{O}_{2}}\] acts as a reserve during muscular exercise.
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