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

Ions - Sodium and Potassium

Anatomy & Physiology

11. Nervous Tissue and Nervous System

Ions - Sodium and Potassium

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Multiple Choice

What ions rush into a neuron during depolarization?

Potassium ions (K+)

Sodium ions (Na+)

Calcium ions (Ca2+)

Chloride ions (Cl-)

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Verified step by step guidance

Understand the concept of depolarization: Depolarization is a process in which the membrane potential of a neuron becomes less negative (more positive) compared to the resting potential.

Identify the ions involved in depolarization: During depolarization, specific ions move across the neuron's membrane, altering its electrical charge.

Recognize the role of sodium ions (Na+): Sodium ions are crucial for depolarization as they rush into the neuron, causing the inside to become more positive.

Consider the mechanism: Sodium channels open in response to a stimulus, allowing Na+ ions to flow into the neuron, leading to depolarization.

Differentiate from other ions: While potassium ions (K+), calcium ions (Ca2+), and chloride ions (Cl-) play roles in other processes, Na+ ions are specifically responsible for the depolarization phase.