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

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Where in the nephron does most solute reabsorption occur?

Collecting duct

Proximal convoluted tubule

Distal convoluted tubule

Loop of Henle

Previous problemNext problem

Verified step by step guidance

Understand the structure of the nephron: The nephron is the functional unit of the kidney, consisting of several parts including the proximal convoluted tubule, loop of Henle, distal convoluted tubule, and collecting duct.

Identify the role of each part of the nephron: The proximal convoluted tubule is primarily responsible for the reabsorption of solutes such as glucose, amino acids, and ions. The loop of Henle concentrates urine, the distal convoluted tubule further adjusts the composition of urine, and the collecting duct is involved in the final concentration of urine.

Focus on the proximal convoluted tubule: This section of the nephron reabsorbs approximately 65-70% of the filtered solutes, including sodium, chloride, bicarbonate, and water, making it the site of most solute reabsorption.

Consider the mechanisms of reabsorption: In the proximal convoluted tubule, solutes are reabsorbed through active transport and passive diffusion, facilitated by various transport proteins and channels.

Review the importance of the proximal convoluted tubule: Due to its high capacity for reabsorption, the proximal convoluted tubule plays a crucial role in maintaining homeostasis by regulating the composition of blood and urine.