What is the normal sodium level range in mEq/L?

The normal sodium level range in the body is typically between 135 to 145 milliequivalents per liter (mEq/L). Maintaining sodium levels within this range is crucial for various physiological functions, including the regulation of fluid balance, nerve transmission, and muscle function. Sodium plays an essential role in maintaining osmotic pressure and electrolyte balance; deviations from this range can lead to health issues. For instance, levels below 135 mEq/L could indicate hyponatremia, which can cause symptoms such as confusion, seizures, and muscle cramps. Conversely, levels above 145 mEq/L could suggest hypernatremia, which can result in symptoms like thirst, confusion, and in severe cases, coma. Thus, the range specified is recognized as the standard reference range for sodium levels in the body, making it the correct choice in this context.