Table of contents

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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 structure wraps around and insulates the axons of neurons?

Dendrites

Synaptic cleft

Myelin sheath

Node of Ranvier

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Verified step by step guidance

Identify the function of the structure in question: The structure that wraps around and insulates axons is responsible for increasing the speed of electrical signal transmission along the neuron.

Understand the role of myelin: Myelin is a fatty substance that forms a sheath around the axons of many neurons, providing insulation and facilitating rapid signal conduction.

Differentiate between the options: Dendrites receive signals, the synaptic cleft is the gap between neurons, and the Node of Ranvier is a gap in the myelin sheath that aids in signal propagation.

Recognize the correct structure: The myelin sheath is the specific structure that wraps around and insulates the axons, enhancing the speed and efficiency of nerve impulse transmission.

Conclude with the correct answer: Based on the function and characteristics, the myelin sheath is the structure that insulates axons, distinguishing it from the other options provided.