ADH causes increased permeability of DCT and collecting tubule to water that leads to increase in water re absorption that leads to decrease in water excretion ADH secreted by hypothalamus and storeed in posterior pituitary gland Syndrome of inappropriate ADH secretion caused by decreasing the production of ADH from posterior pituitary or ectopic sources Clinical features are increasing blood volume,decresed urinary excretion of water that leads to overhydration Diabetes insipidus complete or partial failure to ADH secretion,polyurea,polydipsia are seen as clinical features. Diuretics are drugs used to increase water excretion. Solution ADH causes increased permeability of DCT and collecting tubule to water that leads to increase in water re absorption that leads to decrease in water excretion ADH secreted by hypothalamus and storeed in posterior pituitary gland Syndrome of inappropriate ADH secretion caused by decreasing the production of ADH from posterior pituitary or ectopic sources Clinical features are increasing blood volume,decresed urinary excretion of water that leads to overhydration Diabetes insipidus complete or partial failure to ADH secretion,polyurea,polydipsia are seen as clinical features. Diuretics are drugs used to increase water excretion..