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 statement best describes the myelin sheath?

It is a protein structure that forms synapses between neurons.

It is a type of neuron that transmits sensory information to the brain.

It is a fatty layer that insulates axons and speeds up nerve impulse transmission.

It is a cellular structure that produces neurotransmitters.

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Verified step by step guidance

Begin by understanding the function of the myelin sheath in the nervous system. The myelin sheath is crucial for the efficient transmission of electrical signals along the axon of a neuron.

Recognize that the myelin sheath is composed of fatty substances, primarily lipids, which provide insulation to the axon. This insulation is essential for preventing signal loss and ensuring rapid transmission of nerve impulses.

Consider the role of the myelin sheath in increasing the speed of nerve impulse transmission. It achieves this by allowing the electrical signal to jump between nodes of Ranvier, which are gaps in the myelin sheath along the axon.

Differentiate the myelin sheath from other structures mentioned in the problem, such as synapses, sensory neurons, and neurotransmitter-producing structures. The myelin sheath does not form synapses, transmit sensory information, or produce neurotransmitters.

Conclude that the statement 'It is a fatty layer that insulates axons and speeds up nerve impulse transmission' best describes the myelin sheath, based on its composition and function in the nervous system.