AIPMT PRELIMS2011Zoology-Respiratory System
AIPMT PRELIMS 2011 Zoology Oxygen Transport MCQ Question
Type: MCQ-conceptual-Medium-Class 11
A large proportion of oxygen is left unused in the human blood even after its uptake by the body tissues. This O₂
A
Helps in releasing more O₂ to the epithelium tissues
B
Acts as a reserve during muscular exercise
C
Raises the pCO₂ of blood to 75 mm of Hg
D
Is enough to keep oxyhaemoglobin saturation at 96%
Correct Answer
Option B
Detailed Explanation
Our tissues can utilize only 25% of O₂ carried by arterial blood. The remaining O₂ acts as a reserve during muscular exercise.
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