Water balance Flashcards
What does homeostasis need to do to water?
involves controlling both water intake and output
When does water balance exist?
when water intake equals water output
how is 60% of daily water gained from?
drinking fluids
Where does 30% of water come from?
moist foods
where does 10% of water come from?
produced during the metabolism of nutrients; this is called metabolic water
What is the primary regulator water intake?
thirst
Where is the thirst centre located ?
in hypothalamus
What is thirst derived from?
an increase in the osmotic pressure of extracellular fluids, with neural and hormonal contributions
How are changes detected by?
by osmoreceptors in the hypothalamus
What does a 1% decrease in total body water elicits?
elicits the homeostatic mechanism of thirst
What happens once water is taken in?
the stomach will inhibit the thirst mechanism
