Cell Bio Final- Upper GI
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Ectoderm gives rise to cells that are committed to forming
the enamel organ
Simple columnar epithelium extends the whole length of the GI tract except the esophagus and anal canal which have this type of tissue
Stratified, NON-keratinized squamous for protection and to reduce friction
Neural crest forms the dental papilla, which forms?
Dentin, Cementum, and Pulp
Specific organic components, other than collagen, such as Amelogenins and enamelins are unique to?
Enamel
The tongue has four types of papillae. which type tacks taste buds?
filiform papillae
taste buds contain?
sustentacular cells and taste cells
Taste cells release these molecules from their basal membranes?
Neurotransmitters
Serous glands whose ducts empty into the moats at the bases of circumvallate papillae are associated with?
Von Ebner’s Glands
What are the layers of the gut? (internal to external)
mucose, submucosa, external, muscle, serosa adventitia
the nerve plexus between the submucosa and circular muscle layer of muscularis externa
Meissner’s plexus (submucosal)
The nerve plexus located between the two layers of muscularis externa
Myenteric plexus of Auerbach
Gastric glands are long tubular glands extending down to which layer of the gut?
muscularis mucosae
gastric glands are composed of 5 different types of cells
mucous neck cells, parietal cells, chief cells, stem cells, and enteroendocrine cells
The parietal cell is eosinophilic in nature that produces HCl and gastric intrinsic factor. T/F?
so true!
intracellular canaliculi lined by microvilli are common in these cells?
Parietal
Pepsinogen is secreted by?
Chief cells