Fundamentals of Human Nutrition/Sodium

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9.1 Sodium[edit]

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9.1.1 Sources[edit]

9.1.2 Functions[edit]

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Sodium is one of the key nutrients to hydric balance.

Humans take all the Sodium (Na) that we need in the form of salt. Edible salt is composed primarily of sodium chloride (NaCl),

Sodium: - Principal cation in extracellular fluid. - Helps to stabilize the potassium/sodium ratio - Regulates blood volume. - Regulates blood pressure. - Regulates osmotic equilibrium. - Regulates acid-base (pH) equilibrium. - Essential for nerve impulse transmission In animals, sodium ions are used against potassium ions to build up charges on cell membranes, allowing transmission of nerve impulses when the charge is dissipated (Wikipedia) - Essential for muscle contraction.

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9.1.3 Requirements[edit]

9.1.4 Imbalance[edit]