Renal 3 Flashcards
where is most potassium reabsorbed
proximal tubule; passively
aldosterone function
enhances K+ secretion in P cells
hyperkalemia
less K+ leaving cell (more +ve in cell - hyperexcitable)
hypokalemia
more -ve resting potential; need larger depolarizing stimulus to fire action potential
when does incr volume, incr osmolarity occur
when eating salty foods and drinking water at the same time; need to excrete the solute and liquid to mathc what was taken in
when does incr volume and no change in osmolarity occur
if salt and water ingested is = to isotonic solution
when does incre volume, decre osmolarity occur
drinking pure water
when does no volume change and incr osmolarity occur
eating salt without drinking water
when does no volume change and decr osmolarity occur
water and solute lost in sweat
when does decr volume and no change to osmolarity occur
hemorrhage; losing isotonic fluid (blood)
when does decr volume and decr to osmolarity occur
incomplete compensation for dehydration
when does decr volume and incre osmolarity occur
severe dehydration
