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

Introduction to Organ Systems

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Introduction to Organ Systems

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Multiple Choice

Which of the following components is primarily reabsorbed in the proximal convoluted tubule of the nephron?

Creatinine

Glucose

Bilirubin

Urea

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Verified step by step guidance

Understand the function of the proximal convoluted tubule (PCT): The PCT is the first segment of the nephron where most reabsorption occurs. It is responsible for reabsorbing essential substances like glucose, amino acids, ions, and water from the filtrate back into the bloodstream.

Identify the substances listed in the problem: Creatinine, glucose, bilirubin, and urea. Determine which of these substances are typically reabsorbed in the PCT.

Recall that glucose is actively reabsorbed in the PCT through sodium-glucose co-transporters (SGLTs). This process ensures that glucose is not lost in the urine under normal physiological conditions.

Note that creatinine is not reabsorbed in the PCT; it is primarily excreted as a waste product. Similarly, bilirubin is not reabsorbed in the nephron, as it is processed by the liver and excreted in bile. Urea is partially reabsorbed in the nephron, but this occurs later in the loop of Henle and collecting ducts, not primarily in the PCT.

Conclude that glucose is the correct answer because it is actively and primarily reabsorbed in the proximal convoluted tubule of the nephron.