MeSH definition : Peptide hormones secreted into the blood by cells in the ISLETS OF LANGERHANS of the
pancreas. The alpha cells secrete glucagon; the beta cells secrete insulin; the delta
cells secrete somatostatin; and the PP cells secrete pancreatic polypeptide.;
Peptide hormones secreted into the blood by cells in the ISLETS OF LANGERHANS of the
pancreas. The alpha cells secrete glucagon; the beta cells secrete insulin; the delta
cells secrete somatostatin; and the PP cells secrete pancreatic polypeptide.