renal physiology Flashcards
what type of cell lines the thick ascending limb of the loop of henle?
simple squamous epithelium
which kind of membrane will be most effective at preventing albumin filtration?
small pore size and a negative charge
what is the main stimuli for H ion secretion?
decreased pH of extracellular fluid and increased pCO2 of the extracellular fluid
what is a co transporter for amino acids?
sodium
where does aldosterone act upon?
the principle cells in the collecting duct
what is the main osmotically active ion in the intracellular compartment?
potassium
what do prostaglandins dilate?
the afferent arteriole
what is ANP secreted in response to?
a large increase in extracellular fluid
what has the greatest influence on regulation of GFR?
glomerular hydrostatic pressure
what is actively reabsorbed in the thin ascending loop of henle?
nothing
what is the blood supply to the loop of henle in juxtaglomerular nephrons?
vasa recta
what causes a decrease in net filtration pressure?
an increase in the oncotic pressure in the glomerular capillaries
where is renin released from?
granular cells in the afferent arteriole
what excretes excess dietary potassium?
principle cells of the late distal tubules and collecting ducts
what is the largest fluid compartment in the body?
the intracellular compartment
