Angiotensin-II is an active peptide hormone. Angiotensin-I is secreted inactively from the liver. Inactive Angiotensin-I is then converted to active Angiotensin-II. It increases aldosterone hormone synthesis and secretion. Increases secretion of pituitary gland. Causes constriction of blood vessels and increases blood pressure. Stimulates sodium reabsorption in the proximal convoluted tubule.