What is the normal range for serum sodium levels in mEq/L?

The normal range for serum sodium levels is between 135 and 145 mEq/L. Sodium is a crucial electrolyte in the body, playing key roles in fluid balance, blood pressure regulation, and nerve and muscle function. Maintaining sodium levels within this range is essential for physiological homeostasis.

Levels below 135 mEq/L can indicate hyponatremia, which can lead to symptoms such as confusion, seizures, and in severe cases, coma. On the other hand, levels above 145 mEq/L signify hypernatremia, which can result in neurological symptoms and dehydration. Therefore, the established normal range ensures that sodium levels are sufficient for optimal bodily functions.

The other ranges provided do not fall within the accepted normal limits for serum sodium levels, making them incorrect options.