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 Nervous Tissue

Anatomy & Physiology

4. Tissues & Histology

Introduction to Nervous Tissue

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Multiple Choice

What cells form the myelin sheaths around nerve fibers in the peripheral nervous system (PNS)?

Astrocytes

Microglia

Schwann cells

Oligodendrocytes

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Verified step by step guidance

Understand the role of myelin sheaths: Myelin sheaths are insulating layers that surround nerve fibers, which help increase the speed at which electrical impulses propagate along the nerve cells.

Identify the location: The problem specifies the peripheral nervous system (PNS), which is distinct from the central nervous system (CNS). Different types of cells are responsible for myelination in these two systems.

Differentiate between cell types: In the CNS, oligodendrocytes are responsible for forming myelin sheaths. In the PNS, Schwann cells perform this function.

Review the function of Schwann cells: Schwann cells wrap around the nerve fibers in the PNS, creating a myelin sheath that facilitates rapid signal transmission.

Eliminate incorrect options: Astrocytes and microglia are not involved in myelination. Astrocytes provide support and nutrition, while microglia act as immune cells in the CNS.