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 type of nephrons have long nephron loops that extend deep into the medulla?

Cortical nephrons

Proximal nephrons

Juxtamedullary nephrons

Distal nephrons

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Verified step by step guidance

Begin by understanding the structure and function of nephrons in the kidney. Nephrons are the functional units of the kidney responsible for filtering blood and forming urine.

Recognize the two main types of nephrons: cortical nephrons and juxtamedullary nephrons. Cortical nephrons are located primarily in the renal cortex, while juxtamedullary nephrons are situated near the junction of the cortex and medulla.

Identify the key difference between these two types of nephrons. Juxtamedullary nephrons have long nephron loops, known as loops of Henle, that extend deep into the renal medulla. This anatomical feature is crucial for the concentration of urine.

Understand the physiological significance of the long nephron loops in juxtamedullary nephrons. These loops play a vital role in the countercurrent multiplication system, which helps concentrate urine and conserve water.

Conclude that the type of nephrons with long nephron loops extending deep into the medulla are juxtamedullary nephrons, as they are specifically adapted for efficient water reabsorption and urine concentration.