What is the normal range of serum sodium levels in adults?

• A. 120-130 mEq/L
• B. 130-140 mEq/L
• C. 135-145 mEq/L
• D. 140-150 mEq/L

Answer: (C)

The normal range of serum sodium levels in adults is critically important for understanding fluid and electrolyte balance within the body. Sodium is a key electrolyte that helps regulate blood pressure, blood volume, and overall cellular function. The established normal range for serum sodium is 135-145 mEq/L.

This range indicates the optimal levels needed for various physiological processes, including nerve impulse transmission and muscle contraction. Maintaining sodium levels within this range is vital for health, as both hyponatremia (low sodium) and hypernatremia (high sodium) can lead to significant health issues.

Having a normal serum sodium level is crucial as deviations from this range can result in complications like confusion, seizures, or even coma if not managed properly. Being aware of these levels aids healthcare professionals in diagnosing and treating electrolyte imbalances effectively.