<prompt> D cells of pancreas secrete: September 2012GlucagonInsulinSomatostatinPancreatic polypeptide  <response>: Ans. C i.e. SomatostatinPancreasIt is a dual-function gland, having features of both endocrine and exocrine glands.The pa of the pancreas with endocrine function is made up of approximately a million cell clusters called islets of Langerhans.Four main cell types exist in the islets. They can be classified by their secretion:- Alpha cells secrete glucagon increase glucose in blood,- Beta cells secrete insulin decrease glucose in blood,Delta cells secrete somatostatin regulatesstops alpha and beta cells and- PP cells, or gamma cells, secrete pancreatic polypeptide 