ACE Personal Trainer Practice Exam

What is an electrolyte?

1. A type of carbohydrate used for energy

2. A mineral that exists as a charged ion

3. A hormone involved in metabolism

4. A type of protein in muscle tissue

The correct answer is: A mineral that exists as a charged ion

An electrolyte is best defined as a mineral that exists as a charged ion. Electrolytes play a crucial role in various physiological processes, including maintaining fluid balance, transmitting nerve impulses, and supporting muscle function. When dissolved in bodily fluids, these minerals separate into charged particles, which are essential for conducting electrical signals in the body. The other options do not accurately describe electrolytes. Carbohydrates are primarily energy sources for the body, hormones are signaling molecules that regulate various bodily functions, and proteins are made up of amino acids and play roles in structure and function within muscle tissue. Understanding the specific function of electrolytes helps in recognizing their importance in overall health and fitness, especially during exercise and hydration management.