Ok...so the saying sodium follows water is incorrect? I mean sweating makes u lose water thru the skin, so why wouldnt we lose salt? So why doesnt sweating make ur sodium level fall..making it hyponatremia?
An increased sodium concentration would cause water to move into the cell, but since sodium does not follow water out as you are sweating. electrolytes are lost through the skin as well while sweating, but majority of water, which is why you would have an increased sodium concentration in the system, thus causing hypernatremia.
"Vomiting and diarrhea cause both sodium and water loss," is the rationale for not selecting C) "vomiting and diarrhea," as the cause of hypernatremia. However, vomiting and diarrhea ARE causes of hypernatremia, as mentioned in my lab textbook. The "water loss is greater than the Na+ loss."