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 best describes the apical surface of epithelial tissue?

It is the area where blood vessels enter the epithelial tissue.

It is the surface of the epithelial cell that faces the body surface or the lumen of an internal organ.

It is the surface that attaches to the underlying connective tissue.

It is the region where epithelial cells are anchored to each other by desmosomes.

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Verified step by step guidance

Understand the structure of epithelial tissue: Epithelial tissue is composed of tightly packed cells that form a protective layer covering body surfaces, lining cavities, and forming glands. It has distinct surfaces: the apical surface, the basal surface, and lateral surfaces.

Define the apical surface: The apical surface is the free surface of epithelial cells that faces either the external environment (e.g., skin) or the lumen (interior space) of an organ, such as the inside of the stomach or intestines.

Differentiate the apical surface from other surfaces: The basal surface is the part of the epithelial tissue that attaches to the underlying connective tissue via the basement membrane. The lateral surfaces are where epithelial cells are connected to neighboring cells through junctions like desmosomes.

Eliminate incorrect options: The apical surface is not where blood vessels enter the epithelial tissue (epithelial tissue is avascular). It is also not the surface that attaches to connective tissue or the region where cells are anchored by desmosomes.

Select the correct description: The apical surface is best described as the surface of the epithelial cell that faces the body surface or the lumen of an internal organ.