4.3.5 Flashcards
what do adrenal medulla hormone do?
fight or flight respinse
vasconstriciton except for skeltal and cardiac muscle
what drug acts as a catecholamines
nicotine
what do atrial natrieretic peptide do
produce by atria of heart
causes BV and BP to decrease
generalized vasodilation
antidiuretic hormone function
stimulates kidney to conserve water
high levels can cause vasoconstriction
antigoensisn ii
intense vasoconstriction to increase BP
release aldosterone and adh
3 endothelium derived factors
endothelin
platelete derived growth factor
nitric oxide
endothelin= vasconstrictor
platelete derived growth factor= vasoconstrictor
nitric oxide= vasodilation
inflammatory chemicals
histamine, prostacyclin-inflammatory response; potent vasodilator
what does alcohol do
inhibit ADH (makes you wanna pee), depresses vasomotor center, promotes vasodilation
what hapens to baroreceptor with chronic high or low BP
it adapts to a new set point
how do kidneys act directly to regulate blood pressure
independent of hormones
decreas BP or BV by eliminating urine and reducing BP
will conserve water to increase BP
how do kidneys act indirectly to regulate blood pressure
when blood pressure is low it releases renin
renin produces angiotensin ii
angitensin release aldosterone
increase na reabsorption and decreases urine formation
stimulate adh
4 ways to check vital sign
pulse, blood pressure, respiratory rate and body temperature
what causes pulse
pressure wave cause by recoil and expansion of arteries.
found on pressure points
how do sphygmomanometers work
increase cuff past systolic pressure in brachhial artery, slowly release for kotokofff osund
is BP high in morning or night
peak in morning