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.
â¢ Substances that protect body cells and the immune system from damage by harmful chemicals in air and foods. Electrolyte minerals. â¢ Sodium, chloride, and potassium, which control and balance fluid flow in and out of cells. â¢ Sodium, chloride and potassium are called this because they form chemical particles called electrolytes, which attract fluids. Cells move electrolytes through cell walls as needed to balance fluids and keep cells from collapsing or bursting.