Gastrointestinal physiology Flashcards
Layers of the GI tract
mucosa
submucosa
muscularis externa
serosa
Where is the Meissner’s plexus located
submucosa
effects of norepinephrine in the GI tract
reduces motility and secretions and increases constriction of sphincters
secretion of the parietal cells
HCL
intrinsic factor
secretions of the chief cells
pepsinogen
substances that stimulate parietal cells
acetylcholine
histamine
gastrin
Where does most of the control for the pancreatis secretions come?
secretin and cholecystokinin
Where can bile salts be reabsorbed and recycled?
distal ileum
Basic processes of the gut
motility
secretion
digestion
absorption
Plummer-Vinson syndrome
dysphagia
esophageal webs
iron deficiency anemia
Hirschsprung’s disease
failure of enteric nervous system to properly develop
Chaga’s disease effect on GI tract
destroys nervous system
Can cause Hirschsprung’s disease and achalasia
Sjögren’s syndrome
xerostomia
keratoconjuntivitis sicca
connective tissue disease (secondary Sjögren’s)
Zollinger-Ellison syndrome
gastrin secreting tumor - duodenal (peptic) ulcer
