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.
Reference Range. Chloride is the predominant anion that exists in the extracellular space. It maintains cellular integrity via its effects on osmotic pressure and water balance, in addition to maintaining acid-base balance.hloride is an extracellular fluid anion that plays an important role in maintaining normal acid-base balance and along with sodium maintains water balance and serum osmolality.