Which of the following is a major electrolyte in ECF that influences the distribution of water and maintains acid–base balance and nerve function?
A) Potassium
B) Sodium
C) Calcium
D) Phosphorus
B
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Sodium is a major electrolyte in ECF that influences the distribution of water and maintains acid–base balance and nerve function. Potassium controls cellular osmotic pressure, activates enzymes, regulates acid–base balance, maintains nerve and muscle function, and influences kidney function and sugar uptake. Calcium is a major component of bones and teeth that affects permeability of cell membranes and plays a role in blood coagulation and maintenance of heartbeat. Phosphorus is a component of bone and is involved in most metabolic processes.
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