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

Which connective tissue layer directly surrounds individual axons in a nerve?

Endoneurium

Epineurium

Myelin sheath

Perineurium

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Verified step by step guidance

Step 1: Understand the structure of a nerve. A nerve is composed of multiple axons bundled together, and these axons are surrounded by different connective tissue layers for protection and organization.

Step 2: Learn the hierarchy of connective tissue layers in a nerve. The epineurium surrounds the entire nerve, the perineurium surrounds bundles of axons (fascicles), and the endoneurium surrounds individual axons.

Step 3: Differentiate between the connective tissue layers. The endoneurium is the innermost layer that directly surrounds each axon, providing support and insulation. The perineurium is a middle layer that groups axons into fascicles, and the epineurium is the outermost layer that encases the entire nerve.

Step 4: Clarify the role of the myelin sheath. The myelin sheath is not a connective tissue layer but a fatty substance produced by Schwann cells (in the peripheral nervous system) or oligodendrocytes (in the central nervous system) that insulates axons to enhance signal transmission.

Step 5: Based on the definitions and hierarchy, identify that the connective tissue layer directly surrounding individual axons is the endoneurium.