how much urine does a person excrete a day
1400ml
what makes up the ECF
interstitial fluid and blood plasma
what body fluid compartment has the largest volume
intracellular
transcellular fluid makes up about ___ liters
1-2
which cation/anion in ECF
Na and Cl. ca hCO3
which cation/anion in ICF
k Mg, PO4 and organic anions, proteins
____ follows ____
water follows salt
total body water is ___ of body weight
60
osmosis is diffusion from ___ to ___
high to low
isotonic added to ECF
no change in osmolarity, increase ECF volume
hypotonic added to ECF
ECF osmo decreases. water moves into cells. icf (more) and ecf volume both up.
hypertonic added to ECF
ECF osmo increases. water moves from cells to ECF. increase in ECF volume, decrease in ICF volume, rise osmo both.
primary loss of water from ECF results in
hyponatremia and dehydration, associated with decreased ECF
hyponatremia = ____na and ___h20
dec Na, excess H20
hyponatremia conditions
diarrhea, vomiting, diuretic abuse, addisons (dec aldosterone), excess water retention (ADH)
addisons =
decreased aldosterone
hyponatremia = ___ ADH and ___ aldosterone
increased ADH and decreased aldosterone
hypernatremia = ___ ADH and ___ aldosterone
decreased ADH and increased aldosterone
hypernatremia conditions
lack of ADH, DI, dehydration, aldosterone secretion
nephrogenic DI
kidneys cant respond to ADH
central DI
lack of ADH - kidneys excrete large amt of dilute urine causing dehydration and excess NaCl in ECF
hypernatremia promotes
ADH, which makes you hang on to more water!
