urinary system Flashcards
what are the 3 redulatory functions of the kidney
filtering, pH adjustment and blood volume pressure
what molecules take part in maintaining ph of blood
H+, NH3 , HCO3, Na
what happens if blood is too acidic
H+ and NH3 are excreted and NAHCO3 are reabsorbed
what happens if blood is too basic
NAHCO3 is excreted and H and NH3 are reabsorbed
where is ADH made and stores
in the hypothalamus and stored in posterior pituitary gland
what does ADH do
increase’s permeability of distal convoluted tubule and collecting duct so more water can reabsorbed
when is ADH released
when someone drink little water
what diuresis
from drinking alcohol and ADH is inhibited
what does ADH stand for
antidiuretic hormone
what is aldosterone secreted by
adrenal cortex of the adrenal gland
what are the three hormones that control water balance
renin, aldosterone and ADH
what is aldosterone function
promote Na reabsorption at the proximal convoluted tubules and excrete of at loop of henle
what is renin
an enzyme that stimulates the release of aldosterone and then NA reabsorption
what is ANH
atrial natriurtic hormone
why is ANH secreted
secreted by cardiac cells when they have been stretched due to high blood pressure
