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

In a cross-section of a peripheral nerve, which structure is labeled as the neurilemma?

The outermost layer of the Schwann cell surrounding the axon

The central region of the neuron containing the nucleus

The inner core of the myelin sheath

The gap between adjacent Schwann cells

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Verified step by step guidance

Step 1: Understand the term 'neurilemma'. The neurilemma is the outermost layer of the Schwann cell that surrounds the axon in the peripheral nervous system. It plays a key role in nerve regeneration.

Step 2: Review the anatomy of a peripheral nerve. Peripheral nerves consist of axons, Schwann cells, myelin sheaths, and nodes of Ranvier. Schwann cells produce the myelin sheath and have an outer layer called the neurilemma.

Step 3: Differentiate the options provided. The neurilemma is not the central region of the neuron containing the nucleus (this is the soma), nor is it the inner core of the myelin sheath (this is part of the myelin itself). It is also not the gap between adjacent Schwann cells (this is the node of Ranvier).

Step 4: Identify the correct description. The neurilemma is specifically the outermost layer of the Schwann cell that surrounds the axon, which matches the first option provided.

Step 5: Confirm your understanding by visualizing or referencing diagrams of peripheral nerve anatomy to see the relationship between the axon, Schwann cells, myelin sheath, and neurilemma.