...............

no one start from the standard by WHO ?

basically water quality is measured by :
1) qualitative : appearance, taste, smell
2) quantitative : all chemical composition of the water
3) microbiologic : all microorganisms

shouldn't be too hard to figure out the difference i think.

and battery water you use to fill up the battery is DISTILLED WATER.

when you buy your battery.......what is the fluid in it? ever ponder on that?

nothing to do with the digestive tract. it's more to the influence of increasing amount of electrolyte free fluid to the interstitial space, hence, it becomes hypotonic relative to the fluid in the cell and then osmosis blablabla.....you know.
you are alive because the diet of most urban people(which likely include you) is actually have excess in sodium and other elements. which together with the kidneys compensate quite well. not that i am encouraging you to eat more salty food or drink more distilled water though

This post has been edited by slimey: Sep 28 2010, 08:16 PM

it so happens that the other stuff in the digestive tract you mentioned also comes from the body........so net effect is still the decrease of the concentration of the electrolyte.
sodium may not have to be the salt we use in our food. there's so many "hidden" source of sodium.
and yes.....the body is very good in osmoregulation.......there's a limit to it but no worries.....there's many signs the body will tell you when the limit of the osmoregulation is near.