Mucus Secreted by neck surface mucous cells, cardiac pyloric glands Function:form mucus-bicarbonate barrier Intrinsic factor Secreted by parietal cells Function:Promote the absorption of Vit B12 Regulation of gastric secretion Endogenous releasing substances Acetylcholine (ACh),gastrin histamine Somatostatin (SST)(release-inhibiting)Mucus Secreted by neck & surface mucous cells, cardiac & pyloric glands Function: form mucus-bicarbonate barrier Intrinsic factor Secreted by parietal cells Function: Promote the absorption of Vit B12 * Regulation of gastric secretion Endogenous releasing substances Acetylcholine (ACh), gastrin & histamine Somatostatin (SST) (release-inhibiting)