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

Which of the following would decrease the glomerular filtration rate?

Decreased sympathetic nervous system activity

Increased blood pressure

Constriction of the afferent arteriole

Dilation of the afferent arteriole

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Verified step by step guidance

Understand the role of the glomerular filtration rate (GFR) in kidney function. GFR is the rate at which the kidneys filter blood, and it is influenced by the blood flow into the glomeruli.

Identify the factors that affect GFR. These include blood pressure, the diameter of the afferent and efferent arterioles, and the activity of the sympathetic nervous system.

Consider the effect of arteriole diameter on GFR. The afferent arteriole brings blood to the glomerulus. Constriction of the afferent arteriole reduces blood flow into the glomerulus, thereby decreasing GFR.

Contrast this with dilation of the afferent arteriole, which increases blood flow into the glomerulus and thus increases GFR.

Evaluate the impact of sympathetic nervous system activity and blood pressure. Decreased sympathetic activity generally leads to vasodilation, increasing GFR, while increased blood pressure can increase GFR unless counteracted by autoregulatory mechanisms.