Renal 1 Flashcards
what is the most important function of the kidneys
homeostatic regulation of water and ion content of the blood
what are the 4 components of the urinary system
kidney
ureter
urinary bladder
urethra
where are kidneys?
against your back
how much cardiac output do the kidneys receive
20-25%
why do the kidneys receive so much blood
for rapid regulation of fluid/filtration
whats the basic functional unit of kidneys
nephrons
whats the breakdown of cortical vs juxtamedullary nephrons
80% cortical
20% juxtamedullary
where are cortical nephrons usually found
in the cortex
where are juxtamedullary nephrons usually found
deep in the medulla
where are the loops of henle located
the medulla of the kidney
where are Bowmans capsules located
the cortex
what artery feeds the kidney
renal artery
what does the juxtamedullary nephron contain that the cortical doesn’t
vasa recta
whats the flow through cortical nephrons
renal artery
afferent arterioles
glomerulus (capilaries)
efferent arteriole
peritubular capillaries
renal vein
whats the flow through juxtamedullary nephrons
renal artery
afferent arterioles
glomerulus (capilaries)
efferent arteriole
vasa recta
renal vein
what is the vasa recta
peritubular capillaries that exist within the juxtamedullary nephrons
what is unique about the vascular components of the renal system
it is a portal system with 2 capillary beds in series
what are the 2 things found in the cortex
afferent arterioles and the glomeruli
where does filtration occur
the Bowmans capsule by the glomerlus capillaries
what is secretion
movement from the peritubular capillaries into the nephron
what is reabsorption
the movement from the nephron into capillaries
whats the tubular component order of a nephron?
Bowmans capsule
proximal tubule
descending loop of henle
ascending loop of henle
distal tube
collecting duct
what are the main 4 kidney processes
filter
reabsorb
secrete
excrete
what is filtration
movement from blood to lumen
