21. Regulation of Arterial Pressure Flashcards
What is the equation for mean arterial pressure?
MAP = Cardiac Output x Total Peripheral Resistance
(Cardiac Output = HR x Stroke Volume)
(Stroke Volume = EDP - ESP)
What cranial nerve is associated with baroreceptors in the carotid sinus?
CN IX
Glossopharyngeal
What nerurotransmitter is associated with the nucleus tractus solitarius?
Glutamate
What is the rostral ventrolateral medulla in charge of?
Sending sympathetic signals to the heart as a part of the baroreceptor reflex.
What two regions of the brain stem are in charge of sending parasympathetic nerve fibers to the heart as a part of the baroreceptor reflex?
Dorsal motor nucleus of the vagus
Nucleus abmbiguus
What is the highest mean arterial pressure that the carotid bodies can report?
About 200 mmHg
What stimulates renin to be produced by the kidneys?
Low BP
Beta 1 adrenergic receptor activation
What four things does Angiotensin II do to increase blood pressure?
Contracts smooth muscle via the AT1 receptor
Causes secretion of aldosterone
Causes secretion of antiduretic hormone
Increases thirst
What stimulates the release of natriuretic hormone?
Excessive preload
What does natriuretic peptide do?
Dilates the arterioles
Increases fluid loss
Inhibits renin
What does the body do as a response to increased blood volume?
Increase secretion of atrial natriurietic peptide
Decreases aldosterone secretion
Renal vasodilation occurs
Increases heart rate
