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.
Antidiuretic hormone, also known as arginine vasopressin, is the other key hormone that helps regulate fluid balance. Its job is to conserve the amount of water your body loses through urine. It binds to kidney receptors and promotes the re-absorption of water back into circulation, which decreases urine formation.