Electrolytes are best described as

• A. Nutrients required for body temperature regulation
• B. Specialized tissues that conduct nerve impulses
• C. Compounds that provide energy for physical exertion
• D. Salts and other chemicals dissolved in body fluids

Answer: (D)

Electrolytes are salts and other chemicals dissolved in body fluids that dissociate into charged particles (ions). This ion-based nature is what lets them conduct electrical signals, which is essential for transmitting nerve impulses and enabling muscle contractions. They also help regulate fluid balance between inside and outside of cells and contribute to acid-base balance. They are not energy sources, not specialized tissues, and not direct providers of energy for exercise, so the best description is salts and other chemicals dissolved in body fluids.