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

1. Introduction to Anatomy & Physiology

Introduction to Organ Systems

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Introduction to Organ Systems

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Multiple Choice

In general, which type of nerves stimulate motility and secretion in the gastrointestinal tract?

Sensory nerves

Parasympathetic nerves

Sympathetic nerves

Somatic nerves

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Verified step by step guidance

Understand the role of the autonomic nervous system in regulating the gastrointestinal (GI) tract. The autonomic nervous system is divided into the parasympathetic and sympathetic divisions, which have opposing effects on GI motility and secretion.

Learn the function of parasympathetic nerves in the GI tract. Parasympathetic nerves, primarily through the vagus nerve, stimulate motility (movement of food through the GI tract) and secretion (release of digestive enzymes and fluids). This is part of the 'rest and digest' response.

Contrast the role of sympathetic nerves. Sympathetic nerves generally inhibit GI motility and secretion, as part of the 'fight or flight' response, redirecting energy away from digestion.

Understand the role of sensory nerves. Sensory nerves in the GI tract detect changes such as stretch, chemical composition, and pain, but they do not directly stimulate motility or secretion.

Recognize that somatic nerves control voluntary muscles, such as those involved in chewing and swallowing, but they do not regulate the involuntary processes of motility and secretion in the GI tract.