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: Overview

Anatomy & Physiology

25. The Urinary System

Renal Physiology: Overview

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Multiple Choice

Filtrate flow through the renal tubule increases when glomerular filtration rate:

decreases

remains unchanged

is inhibited

increases

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Verified step by step guidance

Understand the relationship between glomerular filtration rate (GFR) and filtrate flow: GFR is the rate at which the kidneys filter blood through the glomeruli. An increase in GFR means more blood is being filtered, leading to a higher volume of filtrate entering the renal tubule.

Recall the anatomy of the renal tubule: The renal tubule is part of the nephron, which processes the filtrate to form urine. Filtrate flow through the tubule depends on the amount of filtrate produced by the glomeruli.

Consider the physiological mechanism: When GFR increases, the pressure in the glomerular capillaries rises, resulting in a higher filtration rate. This directly increases the amount of filtrate flowing into the renal tubule.

Eliminate incorrect options: If GFR decreases, less filtrate is produced, reducing flow through the tubule. If GFR remains unchanged, filtrate flow remains constant. If GFR is inhibited, filtration stops, and no flow occurs.

Conclude that an increase in GFR leads to an increase in filtrate flow through the renal tubule, as more filtrate is produced and enters the tubule for processing.