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

The gray matter of the spinal cord is largely composed of which of the following?

Schwann cells

Neuron cell bodies

Myelinated axons

Ependymal cells

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Verified step by step guidance

Understand the structure of the spinal cord: The spinal cord is divided into gray matter and white matter. Gray matter is primarily composed of neuron cell bodies, dendrites, and unmyelinated axons, while white matter consists mainly of myelinated axons.

Review the function of Schwann cells: Schwann cells are responsible for producing myelin in the peripheral nervous system, not the central nervous system (which includes the spinal cord). Therefore, they are not a major component of the gray matter in the spinal cord.

Consider the role of myelinated axons: Myelinated axons are primarily found in the white matter of the spinal cord, where they facilitate rapid signal transmission. They are not a significant component of the gray matter.

Examine the function of ependymal cells: Ependymal cells line the central canal of the spinal cord and are involved in producing cerebrospinal fluid. While they are present in the spinal cord, they are not the primary component of gray matter.

Conclude that neuron cell bodies are the main component of gray matter: Neuron cell bodies are the defining feature of gray matter in the spinal cord, as they are responsible for processing and integrating information.