Essential mineral: Potassium (k) is an element, it is actually a metal and forms salts easily, much like sodium. Potassium is essential to the function of muscle and nerves via a biologic system of electrical potentials. When the k level outside the cell is too high your heart stops, when the k level is too low muscles freeze up. K levels are controlled by the kidneys, high k levels are frequent in renal failure.
Answered 4/4/2016
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