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.
Electrolytes are important nutrients that help maintain your bodyâs fluid balance. Electrolytes are substances that conduct an electric current. In the body, they help to facilitate actions of the nervous system, maintain proper fluid and acid-base balance, and allow muscles to contract.