Osmolality

I am finishing my project but in stuck in this question. :?: describe the effect of drinking distilled water and isotonic saline on the volume and osmolality of the extracellular fluid. does each fluid have the same effect on the volume of the intracellular fluid? explain.

See entire post

... possible that vasa recta then looses the salt? or does loop of henle donate the water to medulla so vasa recta that has the salt, follows the low osmolality of the medulla? it is very tricky...

See entire post

Hopefully someone can help me :) hopefully I really didnt get my grips with the Loop of henle what is its purpose? is it to maintain osmolality of the interstitial fluid of the medulla, so that they are kinda exchanging salts and water and is that the purpose of urea, to go into the medulla ...

See entire post

http://en.wikipedia.org/wiki/Osmolality

See entire post

osmolality vs osmolarity

See entire post