help again...

So

Lifer
Jul 2, 2001
25,923
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Originally posted by: dym
hmm, any formal answer?

Water goes in through mouth, water comes out through pores, poo and pee hole, net water needs to remain in a range of values, when the vaule approaches the lower limit, internal contol system triggers 'get more water' response. Aquafina profits.
 

cirthix

Diamond Member
Aug 28, 2004
3,616
1
76
the drive-reduction theory sort of explains it

edit: ehres the chart

body senses that it's water level is down>brain recognizes the need for more water> brain creates a feeling that we need water, this is called thirst> we drink water to reduce that need. the cycle repeats

in effect the feeling of "thirst" is entirelly artifical, it is a construct of our brain that motivates us to consume water