Sodium Homeostasis

[postlink]https://mickeyfun.blogspot.com/2009/12/sodium-homeostasis.html[/postlink]http://www.youtube.com/watch?v=W3t8gtN-Wfkendofvid
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Sodium Homeostasis 2

how the body maintains homeostasis of sodium. Topics discussed include why sodium is important in the body, what are the names for deviations of concentration below and above homeostatic levels, causes of those deviations, effects of those deviations, and how the major methods the body uses to correct those deviations.
A copy of this diagram can be obtained here 

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