The vasopressin hormone, secreted by neurohypophysis of pituitary gland promotes the reabsorption of water from the distal convoluted tubules of nephrons, reducing excretion of water in urine (= diuresis). Hence, it is called antidiuretic Hormone (ADH). Its release in blood is controlled by an 'osmoregulatory centre" located in hypothalamus. Hyposecretion of ADH causes diabetes incipidus.