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

The wall of the alveolus (air sac) in the lung is composed of which type of epithelium?

Stratified squamous epithelium

Simple squamous epithelium

Transitional epithelium

Simple cuboidal epithelium

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Verified step by step guidance

Understand the function of the alveolus: The alveoli are tiny air sacs in the lungs where gas exchange occurs. Their structure is optimized for efficient diffusion of oxygen and carbon dioxide.

Recall the characteristics of epithelial tissue types: Simple squamous epithelium is thin and flat, allowing for rapid diffusion, while stratified squamous epithelium is multilayered and provides protection. Transitional epithelium is specialized for stretching, and simple cuboidal epithelium is involved in secretion and absorption.

Match the function of the alveolus to the appropriate epithelial type: Since the alveoli are involved in gas exchange, the epithelium must be thin to facilitate diffusion. This aligns with the characteristics of simple squamous epithelium.

Eliminate incorrect options: Stratified squamous epithelium is too thick for efficient gas exchange, transitional epithelium is not relevant to the lungs, and simple cuboidal epithelium is not specialized for diffusion.

Conclude that the wall of the alveolus is composed of simple squamous epithelium, as it is the most suitable type for the function of gas exchange in the lungs.