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A solid substance dissolved in body fluids.
Solute
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A substance that develops an electrical charge when dissolved in water.
Electrolyte
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Fluid contained within the cells.
Intracellular fluid (ICF)
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Fluid outside the cells; Consists of three types of fluid: interstitial, intravascular, and transcellular fluid.
Extracellular fluid (ECF)
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An electrolyte that carries a positive charge. They include sodium (Na+), potassium (K+), calcium (Ca2+), and magnesium (Mg2+).
Cation
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an electrolyte that carries a negative charge. Examples are chloride (Cl−), bicarbonate (HCO3−), phosphate (HPO42−), and sulfate (SO42−).
Anion
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