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    Diabetes will cause a rise in? K+ levels or blood volume?
    I say K+, because the more urination will result in less fluids. Correct? Any explanations here
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    Hm, I'd say high K+ as well. If you don't control diabetes, kidney damage is inevitable and you reduce your ability to excrete K+ ions, so they'll accumulate in the blood. Also you're right, with diabetes insipidus inability to control water balance -> dehydration and salt concentrations in your blood increase. Really not sure about blood volume, obviously with insipidus it will decrease but mellitus -> lack of insulin and high glucagon levels result in glucose being released into the bloodstream, lowers water potential which should follow by increased water volume and hence total blood volume. But hey, the K+ is increased for sure.
 
 
 
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