<Li> G cells: Produce the hormone gastrin in response to distention of the stomach mucosa or protein, and stimulate parietal cells production of their secretion . G cells are located in the antrum of the stomach, which is the most inferior region of the stomach . </Li> <P> Secretion by the previous cells is controlled by the enteric nervous system . Distention in the stomach or innervation by the vagus nerve (via the parasympathetic division of the autonomic nervous system) activates the ENS, in turn leading to the release of acetylcholine . Once present, acetylcholine activates G cells and parietal cells . </P> <P> Pancreas is both an endocrine and an exocrine gland, in that it functions to produce endocrinic hormones released into the circulatory system (such as insulin, and glucagon), to control glucose metabolism, and also to secrete digestive / exocrinic pancreatic juice, which is secreted eventually via the pancreatic duct into duodenum . Digestive or exocrine function of pancreas is as significant to the maintenance of health as its endocrine function . </P> <P> Two of the population of cells in the pancreatic parenchyma make up its digestive enzymes: </P>

Where is carbohydrase found in the digestive system