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

By what process is sodium moved out of the cell?

Simple diffusion across the cell membrane

Osmosis through aquaporins

Active transport via the sodium-potassium pump

Facilitated diffusion through sodium channels

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Verified step by step guidance

Understand the concept of active transport: Active transport is a process that moves molecules across a cell membrane from a region of lower concentration to a region of higher concentration, which requires energy in the form of ATP.

Identify the role of the sodium-potassium pump: The sodium-potassium pump is a type of active transport mechanism that moves sodium (Na⁺) ions out of the cell and potassium (K⁺) ions into the cell, maintaining the electrochemical gradient across the cell membrane.

Recognize the energy requirement: The sodium-potassium pump uses ATP to change its shape and transport sodium ions out of the cell against their concentration gradient.

Differentiate from other transport processes: Simple diffusion and facilitated diffusion do not require energy and move substances down their concentration gradient, while osmosis specifically refers to the movement of water.

Conclude that sodium is moved out of the cell by active transport via the sodium-potassium pump, which is essential for maintaining cellular homeostasis.