The major anion in extracellular fluid is . a. sodium b....

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Key Concepts

Chloride Ion

The chloride ion is the predominant anion in extracellular fluid. It plays a key role in regulating osmotic pressure, maintaining acid-base balance, and supporting nerve and muscle function by balancing the effects of other electrolytes.

Extracellular Fluid

Extracellular fluid is the body fluid outside of the cells, encompassing plasma and interstitial fluid. It contains a balanced mixture of electrolytes that are essential for maintaining osmotic pressure, pH, and overall cellular function.

Electrolytes

Electrolytes are ions, such as sodium, potassium, chloride, and bicarbonate, that carry an electrical charge and are vital for processes like nerve signal transmission, muscle contraction, and fluid balance across different compartments of the body.

Major Anions

Major anions are negatively charged ions that help balance the positively charged electrolytes. Their distribution is critical in maintaining the proper electrical neutrality and acid-base balance in body fluids.

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