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 ions in solution. The human body has lots of electrolytes in blood, plasma, and interstitial fluid (the fluid between cells). Most electrolytes in the body ar â¦ e sodium ions (Na+). The electrolytes in sodium chloride (NaCl) are sodium ions (NaK) and chlorine ions (ClL). Electrolytes are essential to a healthy body because they are what the cells that make up nerves, the heart, and muscles use to carry electrical impulses.