Histology Flashcards
what does the medulla of the kidney consist of
renal pyramids separated by cortical columns
where are arcuate vessels in the kidney
at the boundary between cortex and medulla
what is the difference between interlobular and interlobar vessels
interlobular = go upwards into the cortex from the arcuate vessels interlobar = go downwards into the medulla between the medullary pyramids
what is Bowmans space
the hollow space between capillaries and capsule in the glomerulus
where are podocytes
cover the surface of glomerular capillaries (form the inner layer of the Bowmans capulse
what is special about the endothelium of the capillaries of the glomerulus
the wall is fenestrated - have gaps
what are pedicles
foot processes of podocytes
what covers the space between adjacent pedicils of the podocytes
slit membranes
what composes the filtration barrier in the glomeruls
basal lamina plus slit membranes of the podocytes
explain the cells lining the proximal tubule
simple cuboidal epithelium with a brush border of tall microvilli, with a very folded basolateral membrane and many ion pumps and mitochondria
explain the cells lining of the thin part of the LOH
squamous cells
explain the cells lining the distal tubule
simple cuboidal epithelium with no microvilli, may ion pumps and even more mitochondria than PT
signals from the macula densa do what
signals the juxtaglomerular cells of the afferent arteriole to release renin
explain the cells lining the collecting duct
simple cuboidal epithelium, becoming more columnar along the duct
which vessel to the vasa recta come off
efferent arteriole
