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SCS 2159- GI Exam Latest Update
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SCS 2159- GI Exam Latest UpdateWhat are the four basic digestive processes? - Answer 1. Digestion
2. Absorption
3. Secretion
4. Motility
What are the accessory glands and associated structures of the GI system? - Answer
Salivary glands
Liver
Gallbladder
Pancreas
What are the main organs of the GI tract? - Answer mouth, pharynx, esophagus,
stomach, small intestine, large intestine
What are the four major layers of the GI wall? (From inside to out) - Answer Mucosa,
Submucosa, muscularis externa, serosa
What are the three layers of the mucosa (in to out)? - Answer Mucous membrane, lamina
propria, muscularis mucosae
What does the mucous membrane do? - Answer Lines the lumen
What does the lamina propria contain/ do? - Answer Contains nerves, lymph vessels,
blood vessels
Helps fight disease and bacteria
What does the muscularis mucosae do? - Answer Smooth muscle that produces local
movements of mucosa
What is the submucosa? - Answer Thick layer of connective tissue that keeps walls
disdendable and elastic to allow stretch and bend. Contains nerve cells known as the
submucosal plexus which is part of the enteric nervous system.
What is the muscularis externa? - Answer Responsible for the motility of the GI tract and
contains the myenteric plexus which is the second part of the enteric nervous system.
Inner circular and outer longitudinal layers.
What is the serosa? - Answer The outer most layer of the GI wall and mainly composed
of connective tissue.
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