ELECTROLYTE PANEL MEASURES THE BLOOD LEVELS OF POTASSIUM, SODIUM, CHLORIDE, AND CARBON DIOXIDE. ELECTROLYTES ARE MINERALS, SUCH AS SODIUM AND POTASSIUM THAT ARE FOUND IN THE BODY. THEY KEEP YOUR BODY’S FLUID IN BALANCE AND HELP KEEP YOUR BODY WORKING NORMALLY, INCLUDING YOUR HEART RHYTHM, MUSCLE CONTRACTION, AND BRAIN FUNCTION. CARBON DIOXIDE IS ALSO MEASURED IN THIS TEST. CO2 IS A WASTE PRODUCT MADE WHEN THE BODY BREAKS DOWN FOOD FOR ENERGY (METABOLISM).