Certified Dietary Manager (CDM) Practice Exam

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What is a primary function of potassium in the body?

  1. Reduces cholesterol levels

  2. Supports fluid balance

  3. Promotes muscle building

  4. Increases appetite

The correct answer is: Supports fluid balance

Potassium plays a vital role in maintaining fluid balance within the body. It is an essential electrolyte that helps to regulate the amount of fluid inside and outside of cells. This regulation is crucial for proper cellular function, nerve transmission, and muscle contraction. High potassium levels help mitigate severe fluctuations in blood pressure, support heart health by contrasting the effects of sodium, and facilitate the normal function of muscles and nerves. In terms of overall homeostasis, potassium's ability to maintain proper fluid balance is critical, influencing hydration levels and the efficiency of metabolic processes.

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