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.
Minerals, like vitamins are essential for just about every body process. They are mainly used to regulate and balance our body chemistry. The exceptions to this are Calcium, Phosphorus and Magnesium which are the major constituents of bone and teeth which they help to form. Nerve signals, vital for the brain and muscles, depend on Calcium, Magnesium, Sodium and Potassium. The latter two, Sodium and Potassium, control water balance in the body.