AIIMS2008Zoology-Respiratory System
AIIMS 2008 Zoology Gas Exchange MCQ Question
Type: MCQ-conceptual-Medium-Class 11
When a man inhales air containing normal concentration of O₂ as well as CO he suffers from suffocation because
A
CO reacts with O₂ reducing its percentage in air
B
haemoglobin combines with CO instead of O₂ and forms carboxyhaemoglobin
C
CO affects diaphragm and intercostal muscles
D
CO affects the nerves of the lungs
Correct Answer
Option B
Detailed Explanation
Affinity of carbon monoxide for haemoglobin is 200 times more than oxygen.
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