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Physiology of the Gastrointestinal System
Description: The digestive system, also referred to as the gastrointestinal or alimentary tract, contains the organs involved in the ingestion and processing of food. The digestive system plays a role in four major functions: ingestion, digestion, absorption, and elimination. This course describes the physiology of the gastrointestinal system.
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COURSE OUTLINE
INTRODUCTION
1. Course Information
2. Interface Tour
3. Course Overview
TISSUE STRUCTURE AND SECRETIONS
4. Objectives
5. Alimentary Canal Substructure
6. Mucosa
7. External Layers
8. Esophageal Mucus
9. Gastric Secretory Cells
10. Cell Populations
11. Progress Check
ACID PRODUCTION AND REGULATION
12. Objectives
13. Acidity
14. Gastric Acid
15. Chemical Regulators
16. Cephalic Phase
17. Gastric Phase
18. Intestinal Phase
19. Progress Check
CONCLUSION
20. Summary
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COURSE OBJECTIVES
Students completing this course should be able
to:
- Describe the anatomy of the alimentary canal
- Identify the substance secreted by the esophageal mucosa, and explain its role in the digestive process
- List the secretions produced by glandular cells of the gastric mucosa, and explain the role of each in the digestive process
- Explain how gastric acid is produced by parietal cells
- Name the three main chemical mediators of gastric acid secretion
- Describe the secretion of gastric acid under basal conditions
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