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 Heart2h 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

An action potential is a phenomenon that either happens completely or doesn't happen at all.

True

False

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Verified step by step guidance

Understand the concept of an action potential: An action potential is a rapid rise and subsequent fall in voltage or membrane potential across a cellular membrane, typically in neurons.

Learn about the 'all-or-none' principle: This principle states that an action potential either occurs fully or not at all. Once the threshold is reached, the action potential will proceed without any variation in magnitude.

Identify the threshold potential: The threshold is the critical level to which a membrane potential must be depolarized to initiate an action potential. If the stimulus does not reach this threshold, no action potential will occur.

Explore the phases of an action potential: These include depolarization, repolarization, and hyperpolarization. Each phase is crucial for the propagation of the action potential along the neuron.

Consider the implications of the 'all-or-none' principle: This ensures that action potentials are consistent in strength and speed, allowing for reliable transmission of signals in the nervous system.