Which statement best describes electrolytes?

• A. Nutrients that provide energy to cells.
• B. Minerals that carry an electric charge, essential for fluids, nerves, and muscle function.
• C. Fats that supply long-term energy.
• D. Vitamins stored for blood clotting.

Answer: (B)

Electrolytes are minerals that carry an electric charge when dissolved in body fluids. That charged state lets them conduct electricity necessary for nerve signals and for muscles to contract. They also help regulate the way fluids move between compartments, maintain acid-base balance, and support heart rhythm. Because of these functions, electrolytes are essential for hydration, nerve function, and muscle activity. They aren’t energy sources—that role belongs to carbohydrates, fats, and proteins. They’re not fats, and they’re not vitamins involved in blood clotting.