Osmotic balance in insects is regulated by the excretory system, consisting of Malpighian tubules and the gut under the control of diuretic and antidiuretic factors. Terrestrial insects must conserve water, and antidiuresis is the norm, only interrupted by brief diuretic periods. Surprisingly, little is known about antidiuresis in insects. Two antidiuretic strategies have been described. The fi...

Effects of the diuretic ethacrynic acid on osmotic water permeability were investigated in the isolated perfused collecting tubule of the rabbit kidney. The base-line water permeability of the collecting tubule was not affected when the drug (10(-4)M) alone was added to the bathing medium. Vasopressin alone in the bathing medium (2, 5 muU/ml) elicited a significant increase in osmotic water abs...

Polyuria is not an uncommon perioperative complication, following coronary artery bypass surgery. Diabetes insipidus (DI) results from inadequate secretion of antidiuretic hormone (ADH) the pituitary gland (Central DI)or absence normal response by renal tubules to ADH(Nephrogenic DI).Here we present a 55 years old male who underwent Aortic valve replacement. Postoperatively he developed polyuri...