A) \[C{{O}_{2}}\]concentration in venous blood
B) \[{{O}_{2}}\]concentration in venous blood
C) \[{{O}_{2}}\]concentration is arterial blood
D) \[C{{O}_{2}}\]concentration in arterial blood
Correct Answer: D
Solution :
The respiratory centre in brain is stimulated by medulla oblongata of the hindbrain (brain stein). In a healthy person the presence of elevated concentration of\[C{{O}_{2}}\]in blood (arteries) stimulate the respiratory centre of medulla oblongata to regulate the process of respiration.
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