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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

25. The Urinary System

Renal Physiology Step 2: Tubular Reabsorption

Anatomy & Physiology

25. The Urinary System

Renal Physiology Step 2: Tubular Reabsorption

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Multiple Choice

In the proximal tubule, _ ions are pumped out of the tubule via transport. This creates an gradient, causing water to be reabsorbed through _______.

Potassium; active; osmotic; gaps between cells.

Sodium; passive; osmotic; aquaporins.

Potassium; active; ionic; gaps between cells.

Sodium; active; osmotic; aquaporins.

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Verified step by step guidance

Identify the ions involved in the reabsorption process in the proximal tubule. In this case, the ions are sodium ions.

Determine the type of transport used to move these ions out of the tubule. Sodium ions are typically moved via active transport, which requires energy.

Understand the gradient created by the movement of sodium ions. The active transport of sodium ions establishes an osmotic gradient.

Recognize the mechanism through which water follows the osmotic gradient. Water is reabsorbed through specialized channels known as aquaporins.

Combine these elements to understand the process: Sodium ions are actively transported out of the proximal tubule, creating an osmotic gradient that causes water to be reabsorbed through aquaporins.