Gastric secretions

Which substances, other than endureal point, atomic number 18 entombd by the stomach? pick up their secreted and physiological roles. oTwo main hollow secretors are present in the stomach mucosa: Oxyntic/ stomachic glands pyloric glands In addition, mucus-secreting cells line the entire surface of the stomach (surface mucous glands). These secrete large quantities of a very cohesive mucus that coats the stomach mucosa with a gel seam of mucus, very much more than 1mm thick. These glands provide a study shell of surety for the stomach wall and contri exclusivelye to lubrication of food transport. The mucus produced by these mucus-secreting cells is alkaline (thus the normal stomach wall is not clear to the highly acidic and proteolytic stomach secretions directly).

oOxyntic/stomachal glands: Located on the inside surfaces of the body and fundus of the stomach even out the proximal 80% of the stomach A typical gland is composed of 3 types of cells: mucous neck cells which secrete principally mucus; peptic/chief cells which secrete large quantities of pepsinogen; parietal/oxyntic cells which secrete hydrochloric acid (gastric acid) and intrinsic factor oPyloric glands: Are hardened in the antral portion of the stomach Make up the distal 20% of the stomach resign mainly mucus for tribute of the pyloric mucosa from gastric acid; alike secrete the hormone gastrin and a mid condense amount of pepsinogen oPepsinogen: Secreted mainly by peptic cells of the oxyntic glands, but a small amount is also secreted from the mucous cells of the oxyntic glands and from the pyloric glands (function is the same) M! olecular weight = c. 42,500 Da Is indolent when first secreted into the into the stomach Is activated to plaster cast pepsin: during this process, pepsinogen is smash into a 35,000 Da molecule (pepsin) HCl creates an acidic purlieu which allows pepsinogen to unfold and wedge itself in an autocatalytic fashion, thereby generating pepsin Pepsin acts as an...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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