Water and Electrolytes Flashcards
what is the average GFR
120ml/ min
what hormone influences the kidney collecting ducts
ADH (vasopressin)
if present water reabsorption allowed
where is ADH (vasopressin) produced
produced in hypothalamus and released by posterior pituitary gland
How does ADH increase water reabsorption
by inserting aquaporins in the distal convoluted tubule and the collecting ducts
plasma osmolarity
measure of the bodys electrolyte- water balance
what stimulates ADH release
decreased in blood volume
what regulates K+ concentration
aldosterone - K+ is swapped for Na
what disease can hyposecretion of ADH result in
diabetes insipidus - excess water secretion
what do sensitive toothpaste manufactures claim adding K+ to their toothpastes does
they claim K+ travels along dentinal tubules raises K+ at inner end meaning there would be an extended refractory period where APs couldnt fire
however K+ build up would not persist
what can occur if ECF [K+] was increased
extended refractory time period
