What Is The Relationship Between Body Sodium And Extracellular Fluid Volume?

What Is The Relationship Between Body Sodium And Extracellular Fluid Volume? For example, when sodium intake exceeds sodium output by the kidneys, total body sodium (not Na+ concentration) and extracellular fluid volume increases. Conversely, when renal excretion of sodium Is sodium high in extracellular fluid? It differs from intracellular fluid (fluid within the cells) in