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

Introduction to the Urinary System

Anatomy & Physiology

25. The Urinary System

Introduction to the Urinary System

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Multiple Choice

Which type of nephron is primarily responsible for producing concentrated urine in the human kidney?

Collecting ducts

Cortical nephrons

Juxtamedullary nephrons

Renal corpuscles

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Verified step by step guidance

Understand the role of nephrons in the kidney: Nephrons are the functional units of the kidney responsible for filtering blood and forming urine. There are two main types of nephrons: cortical nephrons and juxtamedullary nephrons.

Learn the difference between cortical and juxtamedullary nephrons: Cortical nephrons are located primarily in the outer cortex of the kidney and are involved in general filtration and urine production. Juxtamedullary nephrons, on the other hand, have longer loops of Henle that extend deep into the medulla, which is crucial for concentrating urine.

Understand the mechanism of urine concentration: The juxtamedullary nephrons create a concentration gradient in the medulla through the countercurrent multiplier system. This gradient allows water to be reabsorbed from the collecting ducts, concentrating the urine.

Recognize the role of the collecting ducts: While collecting ducts are involved in the final concentration of urine, they rely on the medullary gradient established by the juxtamedullary nephrons to reabsorb water effectively.

Conclude that juxtamedullary nephrons are primarily responsible for producing concentrated urine due to their long loops of Henle and their ability to establish the medullary concentration gradient.