A large proportion of oxygen is left unused in the human bl… | CGP Edu

Biology Breathing and Exchange of Gases Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 20, 2026

A large proportion of oxygen is left unused in the human blood even after uptake by the body tissue. This oxygen

A

Is enough to keep oxyhaemoglobin saturation at 96%

B

Helps in releasing more oxygen to epithelial tissues.

C

Acts as reserve during muscular exercise.

D

Raise pCO 2 of blood to 75 mm Hg.

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