William Orville Douglas was the-longest serving member of  the Court, with a tenure of 36 years, 209 days. He was appointed by  President Roosevelt in 1939 and retired in 19â¦75. He was also known  to be a member of the Democratic Party.
Major Electrolytes Located Outside the Cell (Extracellular) Sodium and Calcium Sodium is a major electrolyte in extracellular fluid and it exercises most of its influence outside the cell. The concentration of sodium affects serum osmolality (solute concentration in 1 L of water) and extracellular fluid volume. Sodium also assists nerves and muscle cells to interact.
Electrolyte solutions are ionized salts dissolved in water. The primary electrolyte ions of importance to the body are sodium (Na+), potassium (K+), calcium (Ca2+), magnesium (Mg2+), chloride (Cl-), hydrogen phosphate (HPO42-), and hydrogen carbonate (HCO3-).[1] Whatâs really interesting is that the balance of electrolytes in the bodyâs cells affects hydration.