NETA Personal Trainer Practice Exam

Which mineral is classified as a minor mineral?

1. Potassium

2. Sodium

3. Iron

4. Magnesium

The correct answer is: Iron

Iron is identified as a minor mineral, often referred to as a trace mineral because it is required by the body in smaller amounts compared to major minerals. Although iron is essential for various bodily functions, including the formation of hemoglobin in red blood cells and energy metabolism, it does not have as high a recommended daily intake as major minerals like potassium, sodium, and magnesium. In contrast, potassium, sodium, and magnesium are classified as major minerals because the body requires these minerals in larger quantities to maintain physiological processes, such as fluid balance, muscle contractions, and nerve function. The distinction between major and minor minerals is important for nutrition and diet planning, as it guides individuals on the appropriate intake levels necessary for optimal health.