[email protected]OH: Tuesdays @ 4PM @ Café Roma BIPN 100 Hand-Out #6 2 MAJOR CONTROLLED VARIABLES REGULATING THE CARDIOVASCULAR SYSTEM 1. Cardiac Output (= Stroke Volume x Heart Rate) 2. Blood Pressure MAJOR SENSERS OF BLOOD PRESSURE 1. Stretch Receptors (Baroreceptors) in the Aortic Arch 2. Stretch Receptors in the Carotid Sinuses REGULATION OF THE CARDIOVASCULAR SYSTEM • Increase in pressure detected by baroreceptors in the aortic arch and carotid sinuses cardiac control center parasympathetic neurons (with axons in the VAGUS NERVE) become active [sympathetic activity may also decrease] decreased heart rate (affected by both parasympathetic and sympathetic) AND decreased heart contractility (only if sympathetic activity decreases) ALSO: Increase in pressure increased baroreceptor activity vasomotor center decreased sympathetic neuronal activity (also decreased secretion of epinephrine and norepinephrine from adrenal medulla) vasodilation decrease in blood
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This note was uploaded on 04/11/2008 for the course BIPN 100 taught by Professor French during the Spring '07 term at UCSD.