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

4. Tissues & Histology

Introduction to Epithelial Tissue

Anatomy & Physiology

4. Tissues & Histology

Introduction to Epithelial Tissue

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Multiple Choice

Which of the following is true regarding apical surface features of epithelium?

Desmosomes are found exclusively on the apical surface.

Basement membrane is a specialized apical structure.

Microvilli increase the surface area for absorption.

Apical surfaces are always ciliated in all epithelial tissues.

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Verified step by step guidance

Understand the structure and function of epithelial tissue: Epithelial tissue lines surfaces and cavities in the body, and its apical surface faces the external environment or lumen. The apical surface often has specialized features to perform specific functions.

Clarify the role of microvilli: Microvilli are small, finger-like projections on the apical surface of epithelial cells. Their primary function is to increase the surface area for absorption, which is particularly important in tissues like the intestinal lining.

Differentiate between apical and basal structures: The basement membrane is not an apical structure; it is located at the basal surface of epithelial tissue and provides support and anchorage for the cells.

Explain the role of desmosomes: Desmosomes are specialized cell junctions that provide mechanical strength by anchoring cells together. They are not exclusive to the apical surface; they can be found on lateral surfaces of epithelial cells as well.

Address the presence of cilia: Not all epithelial tissues have cilia on their apical surface. Cilia are specialized structures found in certain epithelial tissues, such as the respiratory tract, where they help move mucus and trapped particles.