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 structure of the nephron is primarily responsible for filtering blood?

Collecting duct

Distal convoluted tubule

Glomerulus

Loop of Henle

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Verified step by step guidance

Step 1: Understand the nephron's role in the kidney. The nephron is the functional unit of the kidney responsible for filtering blood and forming urine. It consists of several structures, each with a specific function.

Step 2: Identify the structure responsible for filtering blood. The glomerulus is a network of capillaries located within the Bowman's capsule. It is the primary site where blood filtration occurs due to hydrostatic pressure forcing water and solutes out of the blood.

Step 3: Differentiate the glomerulus from other nephron structures. The collecting duct is involved in water reabsorption and urine concentration, the distal convoluted tubule fine-tunes ion and pH balance, and the Loop of Henle concentrates urine by reabsorbing water and solutes. None of these structures directly filter blood like the glomerulus.

Step 4: Recognize the filtration process in the glomerulus. Blood enters the glomerulus through the afferent arteriole and exits via the efferent arteriole. The filtration barrier consists of endothelial cells, a basement membrane, and podocytes, which allow selective passage of water and small molecules while retaining larger proteins and cells.

Step 5: Conclude that the glomerulus is the correct answer based on its unique function in blood filtration, distinguishing it from other nephron structures that perform reabsorption, secretion, or concentration tasks.