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

What happens when a resting neuron's membrane depolarizes?

The neuron enters a refractory period.

The inside of the neuron becomes less negative compared to the outside.

The neuron releases neurotransmitters into the synaptic cleft.

The inside of the neuron becomes more negative compared to the outside.

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Verified step by step guidance

Understand the concept of membrane potential: A resting neuron has a membrane potential, which is the electrical potential difference across its membrane. This is typically around -70 mV, with the inside of the neuron being more negative compared to the outside.

Define depolarization: Depolarization is a change in the membrane potential that makes the inside of the neuron less negative compared to the outside. This occurs when positively charged ions, such as sodium (Na+), enter the neuron.

Identify the effect of depolarization: When a neuron depolarizes, the membrane potential becomes less negative. This means the difference in charge between the inside and outside of the neuron decreases.

Differentiate from other options: The refractory period is a phase following an action potential where the neuron is less responsive to stimuli. Neurotransmitter release occurs when an action potential reaches the synaptic terminal, not during initial depolarization.

Conclude with the correct understanding: During depolarization, the inside of the neuron becomes less negative compared to the outside, which is a key step in the process of generating an action potential.