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 of the following correctly identifies the structure responsible for maintaining the resting membrane potential in a neuron?

Node of Ranvier

Myelin sheath

Sodium-potassium pump

Synaptic vesicle

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Verified step by step guidance

Understand the concept of resting membrane potential: Resting membrane potential is the electrical charge difference across the membrane of a neuron when it is not actively transmitting a signal. This is typically around -70 mV in neurons.

Identify the role of the sodium-potassium pump: The sodium-potassium pump is a membrane protein that actively transports sodium (Na⁺) ions out of the cell and potassium (K⁺) ions into the cell against their concentration gradients using ATP. This helps maintain the resting membrane potential.

Compare the given structures: Evaluate the function of each structure listed in the problem. The Node of Ranvier is involved in signal conduction, the Myelin sheath insulates axons to speed up signal transmission, and Synaptic vesicles store neurotransmitters for synaptic communication. None of these directly maintain the resting membrane potential.

Focus on the sodium-potassium pump: The sodium-potassium pump is the correct structure responsible for maintaining the resting membrane potential by ensuring the proper ionic balance across the neuron's membrane.

Conclude the reasoning: Based on the physiological role of the sodium-potassium pump, it is the correct answer because it actively regulates ion concentrations to sustain the resting membrane potential in neurons.