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

Which part of the nephron is primarily responsible for the reabsorption of water and solutes from the filtrate?

Proximal convoluted tubule

Collecting duct

Distal convoluted tubule

Glomerulus

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Verified step by step guidance

Understand the function of each part of the nephron: The nephron is the functional unit of the kidney, and its components include the glomerulus, proximal convoluted tubule, loop of Henle, distal convoluted tubule, and collecting duct. Each part has a specific role in filtration, reabsorption, and secretion.

Review the role of the proximal convoluted tubule: This segment is primarily responsible for the reabsorption of water, ions (like sodium and chloride), and nutrients (like glucose and amino acids) from the filtrate back into the bloodstream. Approximately 65-70% of the filtrate is reabsorbed here.

Examine the role of the collecting duct: The collecting duct is involved in the final concentration of urine. It reabsorbs water under the influence of antidiuretic hormone (ADH) but is not the primary site for reabsorption of solutes and water.

Analyze the distal convoluted tubule: This segment fine-tunes the reabsorption of ions like sodium and calcium and is involved in secretion, but it is not the primary site for water and solute reabsorption.

Clarify the role of the glomerulus: The glomerulus is responsible for filtration, not reabsorption. It filters blood to form the initial filtrate, which then enters the proximal convoluted tubule for reabsorption.