Hyponatremia refers to low levels of which electrolyte?

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Multiple Choice

Hyponatremia refers to low levels of which electrolyte?

Hyponatremia is a low sodium concentration in the blood. Sodium is the major extracellular cation that helps regulate fluid balance and serum osmolality, and it’s essential for normal nerve and muscle function. When sodium falls, water shifts into cells, causing cellular swelling, which in the brain can lead to confusion, seizures, or even coma in severe cases. So the electrolyte with low levels in hyponatremia is sodium. Other minerals like potassium, calcium, and magnesium have their own distinct roles and imbalance effects, but they are not what defines hyponatremia. Normal sodium is typically 135–145 mEq/L, so hyponatremia means levels drop below 135.

Hyponatremia is a low sodium concentration in the blood. Sodium is the major extracellular cation that helps regulate fluid balance and serum osmolality, and it’s essential for normal nerve and muscle function. When sodium falls, water shifts into cells, causing cellular swelling, which in the brain can lead to confusion, seizures, or even coma in severe cases. So the electrolyte with low levels in hyponatremia is sodium. Other minerals like potassium, calcium, and magnesium have their own distinct roles and imbalance effects, but they are not what defines hyponatremia. Normal sodium is typically 135–145 mEq/L, so hyponatremia means levels drop below 135.

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