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 do voltage-gated ion channels open in response to?

A change in membrane potential

An increase in intracellular calcium levels

The binding of neurotransmitters

The presence of ATP

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Verified step by step guidance

Understand the function of voltage-gated ion channels: These channels are integral membrane proteins that open or close in response to changes in the electrical potential across the cell membrane.

Identify the key trigger for voltage-gated ion channels: They are specifically sensitive to changes in membrane potential, which is the difference in electrical charge between the inside and outside of a cell.

Differentiate voltage-gated ion channels from other types of ion channels: For example, ligand-gated ion channels open in response to the binding of neurotransmitters, while other channels may respond to intracellular calcium levels or the presence of ATP.

Consider the physiological context: Voltage-gated ion channels play a crucial role in the generation and propagation of action potentials in neurons and muscle cells, where rapid changes in membrane potential are essential.

Review the options provided: The correct answer is 'A change in membrane potential,' as this is the specific stimulus that causes voltage-gated ion channels to open.