Renal Flashcards
mesonephros becomes
male genital system
paramesonephros becomes
female genital system
metanephros becomes
glomerulus through DCT
ureteric bud becomes
collecting ducts to ureter
MC location for fetal hydronephrosis
ureteropelvic junction
trace path of renal artery
RA > segmental > interlobar > arcuate > interlobular > afferent > glomerulus > efferent > vasa recta/peritubular capillaries > venous outflow
effective renal plasma flow is measured by clearance of
PAH (para-aminohippuric acid)
renal blood flow =
RPF/(1-Hct)
note: plasma fraction by volume = 1-hct
estimated Renal Plasma Flow (over/under) estimates true RPF
underestimates slightly
filtration fraction (FF) =
GFR/RPF
dehydration effects on GFR, RPF, and FF
GFR and RPF go down, but FF goes up
FENA =
Na excreted / Na filtered
= (Una * V) / (GFR * Pna)
= (Pcr * Una) / (Ucr * Pna)
PTH inhibits phosphate reabsorption in this part of kidney
proximal tubule
AT II has this tubular effect
increases water, Na and bicarb reabsorption in proximal tubule (responsible contraction alkalosis)
paracellular transport of Mg2+ and Ca2+ into the blood occurs where
thick ascending loop
PTH increases Ca absorption in this part of the kidney
early distal tubule. does so by increasing Ca/Na exchange at basement membrane of cell
this drug blocks mineralocorticoid receptor but doesn’t block androgen receptor
eplerenone
these drugs block ENaC
amiloride and triamterine
this syndrome syndrome has effects of chronic loop diuretic use
Bartter sydnrome. AR. Causes hypokalemia and metabolic alkalosis with increases urine calcium
this syndrome has the effects of chronic thiazide use
Gitelman syndrome. AR, less severe than Bartter. Hypokalemia, hypomagnesemia, metabolic alkalosis, decreases urine calcium
this syndrome has the effects of hyperaldosteronism
Liddle syndrome. AD (ENaC gain of function)
syndrome of apparent mineralocorticoid excess etiology
deficiency in 11-beta-hydroxysteroid dehydrogenase
JG cells sense
BP. Note: these are modified smooth muscle cells of afferent arterioles
macula densa senses
NaCl. note this is part of DCT
effects of dopamine released by PCT
natriuresis. at low doses, dilates to increase RBF (without changing GFR). At high doses, vasoconstricts
where does conversion of 25OH D to 1,25 OH D take place?
proximal tubule
insulin effects on potassium
shifts into cells