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 Heart2h 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 Step 1: Glomerular Filtration

Anatomy & Physiology

25. The Urinary System

Renal Physiology Step 1: Glomerular Filtration

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Multiple Choice

An important factor directly affecting the glomerular filtration rate is __________.

capsular hydrostatic pressure

net filtration pressure

capsular osmotic pressure

negative pressure

blood osmotic pressure

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Verified step by step guidance

Understand that the glomerular filtration rate (GFR) is the rate at which the kidneys filter blood, and it is influenced by various pressures within the glomerulus.

Identify the key pressures involved in glomerular filtration: glomerular hydrostatic pressure, capsular hydrostatic pressure, blood osmotic pressure, and capsular osmotic pressure.

Recognize that net filtration pressure (NFP) is the driving force for filtration and is calculated by the formula:

NFP = P G - P B - π G

, where

P G

is the glomerular hydrostatic pressure,

P B

is the capsular hydrostatic pressure, and

π G

is the blood osmotic pressure.

Analyze how each pressure affects the NFP: glomerular hydrostatic pressure promotes filtration, while capsular hydrostatic pressure and blood osmotic pressure oppose it.

Conclude that the net filtration pressure is the most direct factor affecting the glomerular filtration rate, as it represents the balance of forces driving filtration.