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

Once the tubular fluid leaves the collecting duct, it is called urine. Which structure does the fluid exit to earn this designation?

Collecting duct

Loop of Henle

Distal convoluted tubule

Proximal convoluted tubule

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Verified step by step guidance

Understand the process of urine formation: Urine is formed through filtration, reabsorption, and secretion in the nephron, which includes structures like the proximal convoluted tubule, loop of Henle, distal convoluted tubule, and collecting duct.

Recognize the role of the collecting duct: The collecting duct is the final structure in the nephron where tubular fluid undergoes final adjustments in water and solute concentration before being designated as urine.

Identify the transition point: Once the tubular fluid leaves the collecting duct, it is no longer considered tubular fluid but is officially designated as urine.

Trace the pathway of urine after the collecting duct: After exiting the collecting duct, urine flows into the renal pelvis, then through the ureters to the bladder for storage.

Review the options provided: The proximal convoluted tubule, loop of Henle, and distal convoluted tubule are earlier structures in the nephron where tubular fluid is processed, but the collecting duct is the final structure before the fluid is designated as urine.