PYQ NEET- Breathing And Exchange Of Gases 2 L-2
Question: A large proportion of oxygen is left unsused in the human blood even after its uptake by
the body tissues. This O2 (NEET 2011)
A) raises the Pco2 of blood to 75 mm of Hg
B) is enough to keep oxyhaemoglobin
C) helps in relasing more 02 to the epithelial tissues
D) acts as a reserve during muscular exercise