TeXes Science Practice Test

What role do electrolytes play in sports drinks during exercise?

1. They provide energy

2. They regulate blood pressure

3. They replace body salts lost during exercise

4. They suppress appetite

The correct answer is: They replace body salts lost during exercise

Electrolytes are essential minerals found in the body that carry an electric charge, and they play a crucial role in various physiological functions. During exercise, especially prolonged or intense physical activity, the body loses electrolytes through sweat. This loss can lead to an imbalance in the body's electrolytes, which can result in muscle cramps, fatigue, and impaired performance. Sports drinks are formulated to replenish these lost electrolytes. By replacing the body salts such as sodium, potassium, and magnesium that are depleted during exercise, sports drinks help maintain proper hydration levels and support muscle function. This replenishment is vital for athletes, as it aids in preventing dehydration and sustaining energy levels throughout the duration of their activity. While other factors such as energy provision and appetite suppression can impact sporting performance, the primary role of electrolytes in sports drinks specifically pertains to replenishing the essential body salts that are lost, making option C the correct choice.