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

2. Cell Chemistry & Cell Components

Introduction to Eukaryotic Organelles

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Introduction to Eukaryotic Organelles

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Multiple Choice

The muscularis mucosae is a thin layer of smooth muscle immediately deep (external) to the:

lamina propria

submucosa

serosa

muscularis externa

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Verified step by step guidance

Step 1: Begin by understanding the structure of the gastrointestinal tract wall, which consists of four main layers: mucosa, submucosa, muscularis externa, and serosa. Each layer has distinct components and functions.

Step 2: Focus on the mucosa layer, which is the innermost layer. It is composed of three sublayers: the epithelium, the lamina propria (a connective tissue layer), and the muscularis mucosae (a thin layer of smooth muscle).

Step 3: Note that the muscularis mucosae is located immediately deep (external) to the lamina propria within the mucosa layer. This means it lies just beneath the lamina propria and is part of the mucosa itself.

Step 4: Understand the other options provided in the question: the submucosa is a separate layer located external to the mucosa, the serosa is the outermost layer of the gastrointestinal tract, and the muscularis externa is a thick layer of smooth muscle responsible for peristalsis, located external to the submucosa.

Step 5: Based on the anatomical organization, recognize that the muscularis mucosae is immediately deep to the lamina propria, making 'lamina propria' the correct answer.