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 of the following correctly matches a region of the nephron with its primary function?

Collecting duct – filtration of large proteins

Loop of Henle – secretion of glucose

Distal convoluted tubule – filtration of blood plasma

Proximal convoluted tubule – reabsorption of water, ions, and nutrients

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Verified step by step guidance

Step 1: Understand the nephron's structure and function. The nephron is the functional unit of the kidney, responsible for filtering blood and forming urine. It consists of several regions, each with specific roles: the proximal convoluted tubule, loop of Henle, distal convoluted tubule, and collecting duct.

Step 2: Analyze the incorrect options. The collecting duct is primarily involved in water reabsorption and concentration of urine, not filtration of large proteins. The loop of Henle is responsible for creating a concentration gradient in the medulla, aiding in water reabsorption, not secretion of glucose. The distal convoluted tubule is involved in selective reabsorption and secretion, not filtration of blood plasma.

Step 3: Focus on the proximal convoluted tubule. This region is responsible for reabsorbing water, ions (such as sodium and potassium), and nutrients (like glucose and amino acids) from the filtrate back into the bloodstream.

Step 4: Relate the correct answer to the nephron's function. The proximal convoluted tubule plays a critical role in maintaining homeostasis by recovering essential substances from the filtrate, ensuring they are not lost in urine.

Step 5: Confirm the correct match. The correct answer is 'Proximal convoluted tubule – reabsorption of water, ions, and nutrients,' as this accurately describes the primary function of this region of the nephron.