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Sodium plays many important roles in the body. It maintains fluid balance and is a main nutrient used in nerve impulse transmission and muscle contraction. The normal range for blood sodium is between 135 and 145 mEq/L (3.10 mg/ml to 3.34 mg/ml). Higher levels of sodium are normally associated with hypertension. A sodium level of 150 mEq/L (3.45 mg/ml) or more is known as hypernatremia, a condition that is commonly caused by dehydration or eating too much salt. However it can also be caused by other conditions such as diabetes or hormonal imbalances.
When sodium (Na+) is combined with chloride (Cl-) the result is sodium chloride (Na+Cl-) aka table salt. A Normal blood sodium level is 135 - 145 milliEquivalents/liter (mEq/L), or in international units, 135 - 145 millimoles/liter (mmol/L). Excess sodium that is consumed in the diet will be excreted in the urine.What sodium does is regulate the total amount of water in the body.hloride a major negative ion (anion) found inside of the cells and the blood. Chloride helps the body maintain its normal balance of fluids. Just like potassium and sodium, chloride can have fatal consequences when the increase or decrease is extreme. The normal serum range for chloride is 98 - 108 mmol/L.