NEET Biology Breathing And Exchange Of Gases Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

Question & Answer Discuss:

A large proportion of oxygen remains unused in the human blood even after its uptake by the body tissues. This $O_2$

(a) raises the $pCO_2$ of blood to 75 mm of Hg

(b) acts as a reserve during muscular exercise

(c) is enough to keep oxyhaemoglobin saturation at 96%

(d) helps in releasing more $O_2$ to the epithelial tissues