Which of the following is one of the six electrolytes identified as most important to body function?

1. The body contains many electrolytes, including trace minerals like iron, zinc, and copper. 2. Six as most important for body function. 3. These six are sodium, potassium, chloride, bicarbonate, calcium, and phosphate. 4. Of the listed options, only phosphate belongs to this core group of six. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 26 "Fluid, Electrolyte, and Acid-Base Balance", p.1259 §Electrolyte Balance_