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Full Text. Hormonal Regulation of the Excretory System. Maintaining a proper water balance in the body is important to avoid dehydration or over-hydration (hyponatremia). The water concentration of the body is monitored by osmoreceptors in the hypothalamus, which detect the concentration of electrolytes in the extracellular fluid.
Summary. 1  Potassium homeostasis is maintained by the balance of potassium excretion and potassium cellular shifts. 2  Potassium excretion is tightly regulated by the kidneys. 3  Potassium cellular shifts are principally mediated by hormones.