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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

Which of the following describes the function of the sodium-potassium pump in cellular physiology?

It transports sodium and potassium ions in equal amounts across the cell membrane without using ATP.

It transports two sodium ions into the cell and three potassium ions out of the cell, using ATP.

It transports three sodium ions out of the cell and two potassium ions into the cell, using ATP.

It allows sodium and potassium ions to passively diffuse across the cell membrane.

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Verified step by step guidance

Understand the role of the sodium-potassium pump: It is a type of active transport mechanism found in the cell membrane that helps maintain the electrochemical gradient across the membrane.

Recognize that the pump uses ATP to function, indicating that it is an active transport process rather than passive diffusion.

Identify the specific ions involved: The pump transports sodium (Na⁺) and potassium (K⁺) ions.

Clarify the direction of ion movement: The pump moves three sodium ions out of the cell and two potassium ions into the cell.

Note the importance of this process: By maintaining the concentration gradients of sodium and potassium, the pump plays a crucial role in nerve impulse transmission and muscle contraction.