During heat exhaustion,a sodium deficit results in hyponatremia.Early symptoms include nausea,abdominal cramps,headache,hyperactivity,and excessive talking.

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The first statement is true; the second is false.During heat exhaustion,hyperactivity and excessive talking are not symptoms.Instead,patients are lethargic and may lapse into coma.Note that symptoms are the result of cellular edema,which is not the same as peripheral edema.The distinction is that with cellular edema,water is primarily retained within cells rather than in the interstitial compartment as occurs in peripheral edema.

During Heat Exhaustion,a Sodium Deficit Results in Hyponatremia