lect 13- urinary system Flashcards
how much of the total cardiac output does the kidney receive
25%
where does hydroxylation and activation of vitamin D for blood calcium homeostasis occur
kidneys
describe the outer layer of the capsule
dense connective tissue, fibroblasts, and collagen
describe the inner layer of the capsule
loose connective tissue, myofibroblasts
what is the dark color of medullary rays due to
collecting ducts
what is the light color of medullary rays due to
glomeruli
what is the area between medullar rays known as
cortical labyrinths
what marks the beginning of the nephron
renal corpuscle
what is the GBM largely composed of
collagen (type 4), proteoglycans, multi adhesive glycoproteins
what prevents the filter of the GBM from clogging
negative charges and phagocytic functions of mesangial cells
what does the macula dense monitor
Na+ concentration of tubular fluid
what type of epithelium is in the proximal convoluted tubule
cuboidal
where is 85% of filtrate reabsorbed in the nephron
proximal convoluted tubule
what is the TDL highly permeable to
water
what is the TAL highly permeable to
NaCl
what does the distal straight tubule reabsorb due to some K+ leaking
calcium and magnesium
what do the light cells of the collecting ducts contain
contain ADH regulated AQP-2 water channels
what cells are involved with H+ secretion of the dark cells of the collecting duct
alpha-intercalated cells
what cells are involved with HCO3- secretion of the dark cells of the collecting ducts
beta-intercalated cells
how does urine leave the collecting tubules
via area cribosa
what type of epithelium is in the ureters
urothelium
what epithelium lines the prostatic urethra
urothelium
what type of epithelium lines the membranous urethra
pseudo stratified columnar
what type of epithelium lines the penile urethra
pseudo stratified columnar
what type of epithelium lines the tip of the penile part of the penile urethra
squamous epithelium
