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

Nervous Tissue: The Neuron

Anatomy & Physiology

4. Tissues & Histology

Nervous Tissue: The Neuron

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Multiple Choice

The myelin sheath along an axon is not continuous. What are the gaps between Schwann cells called?

Synaptic clefts

Axon terminals

Dendritic spines

Nodes of Ranvier

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Verified step by step guidance

Understand that the myelin sheath is a protective covering that surrounds axons in the nervous system, facilitating the rapid transmission of electrical impulses.

Recognize that the myelin sheath is not a continuous layer; it is interrupted at regular intervals along the axon.

Identify that these interruptions or gaps between the segments of the myelin sheath are crucial for the process of saltatory conduction, which allows the nerve impulse to jump from one gap to the next, speeding up signal transmission.

Learn that these gaps are specifically called the 'Nodes of Ranvier', named after the French pathologist Louis-Antoine Ranvier who discovered them.

Differentiate the Nodes of Ranvier from other structures such as synaptic clefts (gaps between neurons at synapses), axon terminals (endings of axons where neurotransmitters are released), and dendritic spines (small protrusions on dendrites that receive synaptic inputs).