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

2. Cell Chemistry & Cell Components

Types of Membrane Proteins

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Types of Membrane Proteins

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Multiple Choice

Which membrane protein maintains the concentration gradients of ions across a neuronal membrane?

Ligand-gated ion channel

Sodium-potassium pump

Voltage-gated sodium channel

Calcium pump

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Verified step by step guidance

Understand the role of membrane proteins in maintaining ion concentration gradients across neuronal membranes.

Identify the function of the sodium-potassium pump, which actively transports sodium (Na⁺) and potassium (K⁺) ions across the cell membrane.

Recognize that the sodium-potassium pump uses ATP to move 3 Na⁺ ions out of the cell and 2 K⁺ ions into the cell, against their concentration gradients.

Compare this function with other membrane proteins like ligand-gated ion channels and voltage-gated sodium channels, which do not actively maintain ion gradients but rather facilitate ion flow in response to specific signals.

Conclude that the sodium-potassium pump is the membrane protein responsible for maintaining the concentration gradients of ions across a neuronal membrane.