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

17. The Blood

Introduction To Blood

Anatomy & Physiology

17. The Blood

Introduction To Blood

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Multiple Choice

The blood-brain barrier consists of tight junctions between which of the following cell types?

Neurons

Microglia

Astrocytes

Endothelial cells

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Verified step by step guidance

Understand the function of the blood-brain barrier: It is a selective permeability barrier that protects the brain from toxins and pathogens while allowing essential nutrients to pass through.

Identify the components of the blood-brain barrier: The barrier is primarily formed by endothelial cells lining the brain's capillaries, which are connected by tight junctions.

Recognize the role of endothelial cells: These cells form the walls of blood vessels and are crucial in maintaining the barrier's integrity through tight junctions.

Differentiate between the cell types: Neurons are nerve cells, microglia are immune cells in the brain, and astrocytes are star-shaped glial cells that support neurons. None of these form the tight junctions of the blood-brain barrier.

Conclude that endothelial cells are the correct answer: They are the cell type responsible for the tight junctions that constitute the blood-brain barrier.