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 best describes the impact of myelin on a neuron?

It prevents the neuron from generating action potentials.

It decreases the neuron's ability to transmit signals.

It increases the speed of nerve impulse conduction.

It causes the neuron to release more neurotransmitters.

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Verified step by step guidance

Step 1: Understand the role of myelin in the nervous system. Myelin is a fatty substance that forms a sheath around the axons of neurons, insulating them and facilitating faster signal transmission.

Step 2: Learn about saltatory conduction. Myelin allows action potentials to 'jump' between nodes of Ranvier (gaps in the myelin sheath), significantly increasing the speed of nerve impulse conduction compared to unmyelinated axons.

Step 3: Evaluate the incorrect options. Myelin does not prevent action potentials; instead, it enhances their conduction speed. It also does not decrease the neuron's ability to transmit signals; it improves it. Myelin does not directly cause the neuron to release more neurotransmitters; neurotransmitter release is regulated by other mechanisms.

Step 4: Focus on the correct option. The correct description of myelin's impact is that it increases the speed of nerve impulse conduction, which is essential for efficient communication within the nervous system.

Step 5: Relate this concept to real-world examples. Diseases like multiple sclerosis, where myelin is damaged, result in slower nerve impulse conduction, leading to neurological symptoms. This highlights the importance of myelin in maintaining proper nervous system function.