<prompt> Endocrine functions associated with kidney include all of the following exceptErythropoietin secretionNatriuretic peptide secretion1,25 hydroxy D3 FormationRenin secretion  <response>: The existence of various natriuretic hormones has been postulated for some time. Two of these are secreted by the hea. The first natriuretic hormone isolated from the hea was atrial natriuretic peptide ANP, a polypeptide with a characteristic 17-amino-acid ring formed by a disulfide bond between two cysteines. A second natriuretic polypeptide was isolated from porcine brain and named brain natriuretic peptide BNP; also known as B-type natriuretic peptide. It is also present in the brain in humans, but more is present in the human hea, including the ventricles. Ref: Ganong;s review of medical physiology,23rd edition, page: 674 