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

1. Introduction to Anatomy & Physiology

What is Anatomy & Physiology?

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

What is Anatomy & Physiology?

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Multiple Choice

Which of the following is a component of the juxtaglomerular apparatus?

Podocyte

Collecting duct

Macula densa

Loop of Henle

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Verified step by step guidance

Understand the juxtaglomerular apparatus (JGA): The JGA is a specialized structure in the kidney that regulates blood pressure and filtration rate in the glomerulus. It consists of three main components: the macula densa, juxtaglomerular cells, and extraglomerular mesangial cells.

Identify the macula densa: The macula densa is a group of specialized epithelial cells located in the distal convoluted tubule, near the glomerulus. These cells sense sodium chloride (NaCl) concentration in the tubular fluid and play a key role in signaling changes in filtration rate.

Eliminate incorrect options: Podocytes are part of the filtration barrier in the glomerulus, not the JGA. The collecting duct is involved in water and electrolyte reabsorption but is not part of the JGA. The Loop of Henle is responsible for creating a concentration gradient in the medulla but is not part of the JGA.

Confirm the correct answer: The macula densa is indeed a component of the juxtaglomerular apparatus, as it plays a critical role in monitoring and regulating kidney function.

Summarize the reasoning: The juxtaglomerular apparatus includes the macula densa, juxtaglomerular cells, and extraglomerular mesangial cells. Among the given options, only the macula densa is part of this structure.