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

Renal Physiology: Regulation of Glomerular Filtration

Anatomy & Physiology

25. The Urinary System

Renal Physiology: Regulation of Glomerular Filtration

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

Which process primarily regulates the excretion of water from the kidneys?

Glomerular filtration rate (GFR) autoregulation

Renin-angiotensin-aldosterone system activation

Antidiuretic hormone (ADH) secretion

Tubular secretion of potassium

Previous problemNext problem

Verified step by step guidance

Understand the role of the kidneys in water balance: The kidneys regulate water excretion primarily through processes that control the reabsorption of water in the nephron, particularly in the collecting ducts.

Learn about Antidiuretic Hormone (ADH): ADH, also known as vasopressin, is a hormone secreted by the posterior pituitary gland. It increases the permeability of the collecting ducts to water, allowing more water to be reabsorbed into the bloodstream and reducing water excretion.

Compare ADH secretion to other processes: While GFR autoregulation, renin-angiotensin-aldosterone system activation, and tubular secretion of potassium are important for kidney function, they primarily regulate blood pressure, electrolyte balance, and filtration rate rather than directly controlling water excretion.

Focus on the mechanism of ADH: ADH binds to receptors on the cells of the collecting ducts, triggering the insertion of aquaporin-2 channels into the cell membranes. These channels facilitate water reabsorption from the filtrate back into the bloodstream.

Conclude that ADH secretion is the primary regulator of water excretion: By increasing water reabsorption, ADH plays a central role in maintaining the body's water balance, especially during dehydration or high plasma osmolarity.