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

11. Nervous Tissue and Nervous System

Change in Membrane Potential

Anatomy & Physiology

11. Nervous Tissue and Nervous System

Change in Membrane Potential

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Multiple Choice

A neuron's membrane potential goes from -90 mV to -10 mV. Which of the following terms describes this change?

Hyperpolarization.

Polarization.

Depolarization.

Repolarization.

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Verified step by step guidance

Understand the concept of membrane potential: Neurons have a membrane potential, which is the electrical potential difference across their cell membrane. This potential is typically negative inside the cell compared to the outside.

Define depolarization: Depolarization occurs when the membrane potential becomes less negative (moves towards zero) compared to the resting potential. This is often due to the influx of positive ions like Na+ into the neuron.

Analyze the given change: The neuron's membrane potential changes from -90 mV to -10 mV. This change indicates that the membrane potential is becoming less negative.

Compare with other terms: Hyperpolarization refers to the membrane potential becoming more negative than the resting potential. Repolarization is the process of returning to the resting potential after depolarization. Polarization generally refers to the state of having a membrane potential.

Conclude the correct term: Since the membrane potential is becoming less negative, the correct term to describe this change is depolarization.