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

The afferent arteriole contains cells called ____________ that secrete the enzyme renin.

podocytes

mesangial cells

macula densa cells

juxtaglomerular cells

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Verified step by step guidance

Understand the anatomy of the nephron and its associated structures. The afferent arteriole is a blood vessel that supplies blood to the glomerulus, a key structure in the kidney responsible for filtration.

Learn about the juxtaglomerular apparatus (JGA), which is a specialized structure located near the glomerulus. It plays a critical role in regulating blood pressure and filtration rate in the kidney.

Identify the specific cell types within the JGA. Juxtaglomerular cells are located in the walls of the afferent arteriole and are responsible for secreting the enzyme renin in response to signals such as low blood pressure or low sodium levels.

Differentiate juxtaglomerular cells from other cell types in the nephron, such as podocytes (which are part of the filtration barrier in the glomerulus), mesangial cells (which provide structural support and regulate filtration), and macula densa cells (which sense sodium concentration in the distal tubule).

Conclude that juxtaglomerular cells are the correct answer because they are the specific cells in the afferent arteriole responsible for renin secretion, which is essential for the renin-angiotensin-aldosterone system (RAAS) that regulates blood pressure and fluid balance.