Certified Dietary Manager (CDM) Practice Exam

What important role does potassium play in the body?

1. It aids in digestion

2. It helps regulate fluid balance

3. It promotes weight gain

4. It increases bone density

The correct answer is: It helps regulate fluid balance

Potassium plays a crucial role in maintaining fluid balance within the body. It is an electrolyte, which means it carries an electric charge that is vital for many physiological processes. The body's cells, tissues, and organs rely on the proper balance of potassium to regulate the amount of fluid inside and outside of cells. This balance is essential for normal cell function, nerve transmission, and muscle contraction, including the heart muscle. In addition to fluid balance, potassium contributes to other functions, such as helping to maintain normal blood pressure levels and supporting proper muscle and nerve function. This emphasizes its significance beyond just fluid regulation; however, fluid balance is indeed one of its primary functions.