Search for house auctions in Upper Marlboro, Prince George's County County, Maryland.
By Dr Ananya Mandal, MD. Electrolytes are essential substances in the body required for cell function and cell signalling. In the human body, the main electrolytes are: 1  Sodium (Na+). 2  Potassium (K+). 3  Calcium (Ca2+). 4  Magnesium (Mg2+). 5  Chloride (Clâ). 6  Hydrogen phosphate (HPO42â). 7  Hydrogen carbonate (HCO3â).
Electrolytes are especially important for normal contraction of skeletal and cardiac muscle fibers. Without the appropriate balance of electrolytes such as potassium and sodium, heart contractions become abnormal and the risk of heart attack increases.