A) Oxygen in trachea
B) Concentration of\[{{O}_{2}}\]
C) Concentration of\[C{{O}_{2}}\]
D) Diaphragm expansion
Correct Answer: C
Solution :
Respiratory centre is more sensitive to the concentration of \[{{O}_{2}}\] in the arterial blood. Rate of breathing is directly affected by concentration of\[C{{O}_{2}}.\]
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