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 is left unused in the human blood even after its uptake by the body tissues. This $O_{2}$

(a) acts as a reserve during muscular exercise.

(b) helps in releasing more $O_{2}$ to the epithelium tissues.

(c) raises the p$CO_{2}$ of blood to 75 mm of Hg.

(d) is enough to keep oxyhaemoglobin saturation at 96%.