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

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Multiple Choice

Almost all of the sodium ions found in the glomerular filtrate are:

excreted unchanged in the urine

destroyed by renal enzymes

reabsorbed by the renal tubules

converted to potassium ions

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Verified step by step guidance

Understand the role of sodium ions in the kidney: Sodium ions are crucial for maintaining fluid balance, blood pressure, and proper functioning of cells. The kidneys play a key role in regulating sodium levels in the body.

Review the process of glomerular filtration: The glomerulus filters blood, allowing water, ions (including sodium), and small molecules to pass into the renal tubules while retaining larger molecules like proteins and blood cells.

Learn about tubular reabsorption: After filtration, the renal tubules reabsorb most of the sodium ions back into the bloodstream. This process is essential for maintaining electrolyte balance and preventing excessive loss of sodium in the urine.

Understand why sodium ions are not excreted unchanged: If sodium ions were excreted unchanged, the body would lose a significant amount of this vital electrolyte, leading to imbalances and health issues. Instead, the majority are reabsorbed.

Clarify why sodium ions are not converted or destroyed: Sodium ions are not converted to potassium ions or destroyed by renal enzymes. Their reabsorption is a selective and active process facilitated by transport proteins in the renal tubules.