What is the normal range for sodium levels in the body?

Sodium is an essential electrolyte in the body, playing a crucial role in maintaining fluid balance, contributing to nerve function, and regulating muscle contractions. The normal range for sodium levels in the body is typically between 135 and 145 milliequivalents per liter (mEq/L). Values within this range indicate that the body is maintaining appropriate sodium levels, which is essential for overall homeostasis.

Levels below 135 mEq/L indicate hyponatremia, which can lead to symptoms such as confusion, seizures, and muscle cramps. Conversely, sodium levels above 145 mEq/L signify hypernatremia, which can lead to symptoms like thirst, restlessness, and potentially severe neurological issues. Therefore, the correct answer reflects the standard reference range for sodium in clinical practice, demonstrating the body's need for balanced electrolyte levels to support various physiological functions effectively.