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 endothelium is composed of which type of cells?

Simple squamous epithelial cells

Transitional epithelial cells

Columnar epithelial cells

Cuboidal epithelial cells

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Verified step by step guidance

Step 1: Understand the term 'endothelium'. The endothelium is a thin layer of cells that lines the interior surface of blood vessels and lymphatic vessels. It plays a critical role in vascular biology, including regulating blood flow and preventing clot formation.

Step 2: Recall the types of epithelial cells. Epithelial cells are classified based on their shape and arrangement: simple squamous (flat and thin), cuboidal (cube-shaped), columnar (tall and column-like), and transitional (specialized for stretching).

Step 3: Match the function of the endothelium with the appropriate cell type. The endothelium needs to allow efficient exchange of gases, nutrients, and waste between blood and surrounding tissues, which is best achieved by thin, flat cells.

Step 4: Identify the correct cell type. Simple squamous epithelial cells are flat and thin, making them ideal for lining blood vessels and facilitating diffusion and filtration processes.

Step 5: Eliminate incorrect options. Transitional epithelial cells are specialized for stretching (e.g., in the bladder), columnar epithelial cells are tall and involved in absorption/secretion (e.g., in the intestines), and cuboidal epithelial cells are cube-shaped and found in glands or ducts. None of these match the structure and function of the endothelium.