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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 these receptor molecules would allow Na+ to flow into the cell?

Potassium leak channel

Calcium pump

Voltage-gated sodium channel

Chloride channel

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Verified step by step guidance

Identify the function of each receptor molecule listed in the problem.

Understand that a potassium leak channel allows K+ ions to move across the cell membrane, typically out of the cell, due to its concentration gradient.

Recognize that a calcium pump actively transports Ca2+ ions out of the cell or into the sarcoplasmic reticulum, using ATP, and does not allow Na+ to flow into the cell.

Acknowledge that a chloride channel allows Cl- ions to move across the cell membrane, usually into the cell, but does not facilitate the movement of Na+ ions.

Conclude that a voltage-gated sodium channel opens in response to changes in membrane potential, allowing Na+ ions to flow into the cell, which is the correct answer.