Table of contents

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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

Aquaporins allow which substance to pass through the descending limb of the loop of Henle?

Water

Glucose

Sodium ions

Urea

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Verified step by step guidance

Understand the function of aquaporins: Aquaporins are specialized protein channels in cell membranes that facilitate the transport of water molecules across the membrane.

Identify the location: The descending limb of the loop of Henle is part of the nephron in the kidney, which plays a crucial role in concentrating urine.

Recognize the permeability of the descending limb: The descending limb is highly permeable to water but not to solutes like sodium ions, glucose, or urea.

Connect aquaporins to water transport: Since aquaporins specifically facilitate the movement of water, they allow water to pass through the descending limb of the loop of Henle.

Conclude the role of aquaporins: Therefore, aquaporins in the descending limb of the loop of Henle primarily allow water to pass through, contributing to the reabsorption process in the kidney.