Breathing and Exchange of Gases Question 24
24. A large proportion of oxygen is left unused in the human blood even after its uptake by the body tissues. This $O_2$
[2011]
(a) acts as a reserve during muscular exercise
(b) raise the $pCO_2$ of blood to $75 mm$ of $Hg$.
(c) is enough to keep oxyhaemoglobin saturation at $96 %$
(d) helps in releasing more $O_2$ to the epithelial tissues.
Show Answer
Answer : a
Hints & Solution
(a) A large portion of oxygen is left unused in the human blood even after its uptake by the body tissues. This $O_2$ acts as a reserve during muscular exercise.
