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During high blood pressure, regulations of heartbeat and circulation are controlled by
(a)Vasodilator and vasoconstrictor centres
(b)Cardio-stimulatory and vasoconstrictor centres
(c)Cardio-inhibitory and vasoconstrictor centres
(d)Cardio-inhibitory and vasodilator centers.

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Important Questions on Body Fluids and Circulation
MEDIUM
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IMPORTANT
Select the correct statement with respect to diseases and immunization:

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In circulatory system, valves occur in
