However each experiment has certain things in common (continued):

• water is ingested
  
  1. to maintain normal fluid balance (control experiments).
  2. to water load (water loading and diuretic experiments).


• a diuretic is administered in some experiments
  
  1. Bumetanide
  2. Acetazolamide
  3. Hydrochlorothiazide
  4. Amiloride