BP=CO x PVR CNS/sympathetic nerves Baroreceptor reflex arc Heart rate Aortic arch contractility carotid sinuses B1-AR Arterial Cardiac a1-AR Peripheral Blood output resistance 度 Pressure Stroke Baroreceptors Na/Ca2+ volume exchange Renin- angiotensin- Venules aldosterone Sodium/ capacitance volumePeripheral resistance Baroreceptor reflex arc Sodium/ volume Venules capacitance Stroke volume Heart rate contractility Na+/Ca2+ exchange Renin￾angiotensin￾aldosterone Cardiac output Arterial Blood Pressure CNS / sympathetic nerves BP = CO  PVR Aortic arch carotid sinuses 1-AR 1-AR Baroreceptors