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Anatomy
Motility Of Gi Tract
Compiled By Muchiri Simon
Edition: 2024/25
, Medical & Nursing | Anatomy I of VIII pages
1. What are 4 physiological processes of the GI system
Motility, secretion, digestions and absorption
2. What are sphincters made of?
Smooth muscle that acts as a valve of a reservoir for holding luminal content adequately
3. What does dysregulation of the activity of sphincters result in?
GI motility disorders
4. What are the major layers of the gut wall?
from lumen of GI tract to the abdominal cavity
Mucosa, submucosa, muscularis externa and serosa
5. What are the parts of the mucosa? (from lumen to the abdominal cavity)
Epithelium, lamina propria and muscularis mucosae
6. What are the parts of the submucosa? (from lumen to the abdominal cavity)
Submucosal nerve plexus
7. What are the parts of the muscularis externa? (from lumen to the abdominal cavity)
Circular muscle and myenteric nerve plexus
8. What are the parts of the serosa? (from the lumen to the abdominal cavity)
Longitudinal muscle and ducts from external endocrine glands(Liver pancreas, salivary glands)
9. What does the epithelial layer consist of?
Exocrine gland cells
- Endocrine cells
10. What do the exocrine cells in the epithelial layer of the gut wall produce?
Mucous and digestive enzymes
11. What do the endocrine cells in the epithelial layer of the gut wall produce?
GI hormones into the blood
- Constitute gut endocrine system
12. What is cholecystokinin released in response to?
Fat and protein in the gut lumen
13. What does the lamina propria consist of?
Small blood vessels
Nerve fibersLymphatic cells/tissue(GALT - gut associated lymphatic tissue)
Loose connective tissue
14. What are the functions of GALT?
1) Secretes antibodies to specific food or bacterial antigens 2) Triggers immunological reactions against them
to mucosal inflammation and damage 3) Provides permission of immunological tolerance to potentially
Anatomy 2024/25 Edition
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