AIIMS2001Zoology-Respiratory System
AIIMS 2001 Zoology Regulation of Breathing MCQ Question
Type: MCQ-conceptual-Medium-Class 11
The respiratory centre in the brain is stimulated by:
A
CO₂ concentration in venous blood
B
O₂ concentration in artery blood
C
CO₂ concentration in artery blood
D
O₂ concentration in venous blood
Correct Answer
Option B
Detailed Explanation
The respiratory center is sensitive to changes in CO₂ levels in the blood. An increase in CO₂ concentration stimulates the respiratory center to increase breathing rate.
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