NANP Board Practice Exam

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Prepare for the NANP Board Exam. Study with detailed questions and explanations on key topics. Enhance your understanding and boost your confidence for the exam.

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Practice this question and more.

Which of the following is not an electrolyte?

Calcium
Manganese
Potassium
Sodium

The correct answer is: Calcium

In the context of electrolytes, these substances are ions found in body fluids that carry an electric charge and are essential for numerous bodily functions. Electrolytes play a crucial role in maintaining fluid balance, enabling muscle contractions, and supporting nerve function. Calcium, potassium, and sodium are recognized as key electrolytes. They all dissociate into ions in solution, contributing to the electrical activity in the body. Calcium, for example, plays a vital role in bone health as well as muscle contractions and neurotransmitter release. Manganese, on the other hand, while an essential trace mineral, does not function as an electrolyte. It is involved in enzymatic processes and metabolic functions but does not dissociate into charged particles that contribute to electrical balance in the body fluids. Therefore, the choice that is not classified as an electrolyte is manganese, as it does not meet the criteria of forming ions in solution like the other listed substances. Understanding the specific roles and classifications of these minerals can help clarify their importance in nutrition and health.