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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

2. Cell Chemistry & Cell Components

Introduction to Membrane Transport

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Introduction to Membrane Transport

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Multiple Choice

What powers the sodium-glucose symporter in active transport?

Glucose concentration gradient

ATP directly

The sodium ion gradient

Potassium ion gradient

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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 against their concentration gradient, requiring energy.

Identify the role of the sodium-glucose symporter: This symporter uses the energy from the sodium ion gradient to transport glucose into the cell.

Explain the sodium ion gradient: The sodium ion gradient is established by the sodium-potassium pump, which uses ATP to move sodium ions out of the cell and potassium ions into the cell.

Clarify why ATP is not directly used: While ATP is used to maintain the sodium ion gradient, it does not directly power the symporter. Instead, the energy from the gradient itself is used.

Summarize the process: The sodium-glucose symporter relies on the sodium ion gradient created by the sodium-potassium pump to facilitate the active transport of glucose into the cell.