Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

23. The Digestive System

Introduction to the Digestive System

Anatomy & Physiology

23. The Digestive System

Introduction to the Digestive System

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Multiple Choice

What are the three phases of gastric secretion in the digestive system?

Oral, esophageal, and gastric phases

Ingestion, digestion, and absorption phases

Buccal, pharyngeal, and esophageal phases

Cephalic, gastric, and intestinal phases

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Verified step by step guidance

Understand that gastric secretion is a complex process regulated by neural and hormonal factors, and it occurs in three distinct phases.

The first phase is the Cephalic phase, which is triggered by the sight, smell, taste, or thought of food. This phase involves the central nervous system, where the brain sends signals to the stomach to prepare for digestion by increasing gastric juice secretion.

The second phase is the Gastric phase, which begins when food enters the stomach. This phase is stimulated by the distension of the stomach and the presence of peptides and amino acids. It involves both neural reflexes and the release of gastrin, a hormone that further stimulates gastric juice production.

The third phase is the Intestinal phase, which starts when partially digested food enters the small intestine. This phase involves hormonal responses that initially stimulate gastric secretion but eventually inhibit it to slow down gastric emptying and allow for proper digestion and absorption in the intestines.

Recognize that these phases work together to ensure that gastric secretion is appropriately regulated, optimizing the digestive process and nutrient absorption.