Which gas is primarily responsible for regulating breathing rate?

Practice MCQ for SSC, UPSC, RRB Exams

A. Oxygen A.
B. Nitrogen B.
C. Carbon monoxide C.
D. Carbon dioxide D.

Correct Answer: D সঠিক উত্তর: D

Explanation ব্যাখ্যা

The body's respiratory system is primarily driven by the need to eliminate carbon dioxide from the bloodstream. When carbon dioxide levels rise in the blood, it triggers the respiratory center in the brain to increase the rate and depth of breathing to expel the excess CO₂.

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