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

25. The Urinary System

The Nephron

Anatomy & Physiology

25. The Urinary System

The Nephron

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Multiple Choice

What effect does antidiuretic hormone (ADH) have on the nephron?

Decreases sodium reabsorption in the proximal tubule

Increases water reabsorption in the collecting ducts

Decreases urea reabsorption in the loop of Henle

Increases potassium secretion in the distal tubule

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Verified step by step guidance

Understand the role of antidiuretic hormone (ADH): ADH is a hormone that helps regulate water balance in the body by controlling the amount of water reabsorbed by the kidneys.

Identify the target area of ADH action: ADH primarily acts on the collecting ducts of the nephron, which is the final segment of the nephron where urine concentration is adjusted.

Determine the effect of ADH on the collecting ducts: ADH increases the permeability of the collecting ducts to water by promoting the insertion of aquaporin-2 water channels into the apical membrane of the duct cells.

Analyze the physiological outcome: By increasing water reabsorption in the collecting ducts, ADH helps concentrate the urine and reduce water loss, thus maintaining body fluid balance.

Evaluate the options given: The correct effect of ADH is to increase water reabsorption in the collecting ducts, which aligns with its primary function in the nephron.