Keep acid/base concentration of blood constant - Function of Kidney
Keep the acid/base concentration of the blood constant and regulate the blood-pressure. Renin, an enzyme- like substance of the kidney, helps in converting angiotensinogen to angiotensin which is responsible for producing vascular constriction, thereby increasing the blood pressure. It also stimulates the secretion of aldosterone from the adrenal glands and causes sodium and water to be retained, increasing blood volume and blood pressure.