Answer by Kelly Jameson. Confidence votes 4.3K. The kidney secretes the hormones renin, calcitriol and erythropoietin. Renin-also known as angiotensinogenase, helps to control the body's blood pressure by regulating the balance of fluid and electrolytes in the body. Calcitriol-This is a form of Vitamin D which regulates calcium and phosphorous levels in the body.