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【单选题】
Concerning the nervous regulation of the circulation:A.
If the arterial pressure suddenly falls the baroreceptor reflex increases the heart rate.
B.
The baroreceptors are mainly responsible for the long-term regulation of systemic blood pressure.
C.
The baroreceptors are found in the aortic and carotid bodies.
D.
The control center of cardiovascular system is the spinal cord.
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