The lower boundary of the exosphere is called the exobase. It is also called exopause and 'critical altitude' as this is the altitude where barometric conditions no longer apply. Atmospheric temperature becomes nearly a constant above this altitude.
Sodium â the volatility and solvent mineral: essential to life, all body fluids contain sodium â itâs needed for many biochemical processes including water balance regulation, fluid distribution on either side of the cell walls, muscle contraction and expansion, nerve stimulation and acid-alkaline balance.
Updated April 20, 2016. Chloride is a major mineral that works with sodium and potassium to keep your body fluid levels balanced. It works by maintaining the fluid volume outside of the cells. The cells in the lining of your stomach need chloride to make hydrochloric acid, which is a component of your digestive juices.