Flashcards in Urinary System I & II Deck (79)
what is the role of the collecting tubules in the medulla?
primary role in producing a concentrated urine (est. a gradient due to the transport fo urea form the tubular fluid into the renal interstitum)
what are the two types of cells found int he cortical collecting tubules?
Light cells - principle
dark cells - intercalated
what is the set up of medullary collecting tubules?
similar to cortical collecting tubules
dark cells present in outer medulla
dark cells absent in inner medulla
principle cells increase in height - only cell lining the collecting tubule in inner medulla!
how are the papillary collecting tubules (duct of Bellini) formed?
converging collecting tubules
what type of epithelium does the papillary collecting tubules (duct of Bellini) have?
only principal cells
where does the papillary collecting tubules (duct of Bellini) empty?
area cribosa on the apex on renal papilla!
what are the two cells types of renal interstitial?
have cells that decrease BP
what is found in upper 2/3 of ureter?
what is found in lower 1/3 of ureter?
additional outer longitudinal later
what is scalloped in relaxed state?
urinary bladder lumen
what are the muscularis layers in the urinary bladder?
what type of epithelium lines the prostatic portion of the male urethra?
what type of epithelium lines the remaining poritions of the male urethra?
pseudostratified or stratifed columnar epithelium
where are mucus secreting glands (of Littre) found in males and females?
beneath BM - subepithelial CT
what makes the thin limb of the loop of Henle different form a capillary?
"lollipop with wrapper" - cytoplasm around lumenal surface = not in capillaries
what does the extraglomerular mesangial cell do?
messenger between macula dense/distal tubule and juxtaglomerular cell
sits between macula densa and blood vessel
if you see macula dense, where are you?
where is angiotensinogen produced?