low potassium, ok sodium

[SL S <stepnout@swva.net>]

The respiratory alkalosis horses develop from racing may be part of the low
potassium (K+) picture.  The electrolyte picture is quite complicated and
involves ion trade-offs in order to maintain pH, or acid-base balance.  My
thinking is K+ is excreted so the body can retain H+ (hydrogen) to help
bring down the elevated pH occurring during extreme carbon dioxide (CO2)
loss.  That's just one aspect of the electrolyte scenario (and it's not
quite the same in horses as in humans.)   Any equine exercise physiologists
care to elaborate?  

Sally in Floyd, VA