Regulation of Renal Hemodynamics Flashcards
which arteriole has the greatest drop in pressure?
afferent
blood flow to an organ is equal to
change in pressure/ resistance
what causes the contraction of blood vessels in response to increased pressures?
myogenic reflex
what is the cause of the steep changes in pressure at either end of the curve?
a maximally constricted or maximally dilated vessel
filtration fraction =
GFR/RPF
what compound decreases afferent pressure but increases efferent pressure?
atrionatreuretic peptide
what is the purpose of the high blood flow to the kidney?
to facilitate filtration
tubular glomerular feedback
the cells in the macula densa regulates glomerular filtration in that particular nephron
the kidneys are innervated by _____ nerves
sympathetic
factors affecting glomerular filtration
intrinsic feedback system renal nerves catecholamines angiotensin II prostaglandins
angiotensin converting enzyme is found on ___
all endothelium cells
angiotensin constricts ___
both afferent and efferent arterioles
how does angiotensin reduce GFR?
by constricting the arterioles and contracting the entire glomerulus
what compounds generated in the kidney are vasodilators? When does this come into play?
prostaglandins, when constrictors are activated (without it you would get renal shut down)
what stimulates the secretion of renin?
- renal baroreceptors 2. sympathetic nerves (directly stimulate JG cells) 3. macula densa
