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

Nervous Tissue: The Neuron

Anatomy & Physiology

4. Tissues & Histology

Nervous Tissue: The Neuron

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Multiple Choice

A neuron receives a stimulus. Which of the following events happens next?

The neuron enters a refractory period.

The neuron's membrane hyperpolarizes.

The neuron's membrane depolarizes, leading to an action potential.

The neuron immediately releases neurotransmitters.

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Verified step by step guidance

Understand the sequence of events in neuronal signaling: When a neuron receives a stimulus, it typically leads to a change in the membrane potential.

Identify the initial response to a stimulus: The first event is usually the depolarization of the neuron's membrane. This occurs when sodium channels open, allowing Na+ ions to flow into the cell, making the inside more positive.

Recognize the role of depolarization: Depolarization is crucial as it leads to the generation of an action potential if the threshold is reached.

Differentiate between depolarization and other events: Hyperpolarization and the refractory period occur after the action potential, not immediately after the initial stimulus.

Conclude with the correct sequence: After depolarization and the action potential, the neuron may release neurotransmitters, but this is not the immediate next step after receiving a stimulus.