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 Step 2: Tubular Reabsorption

Anatomy & Physiology

25. The Urinary System

Renal Physiology Step 2: Tubular Reabsorption

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Multiple Choice

Which of the following substances are secreted during tubular secretion in the kidneys?

Sodium ions

Amino acids

Glucose

Hydrogen ions

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Verified step by step guidance

Understand the process of tubular secretion: Tubular secretion is a part of the kidney's function where substances are transferred from the blood into the renal tubule. This process helps in maintaining the body's acid-base balance and removing excess substances.

Identify substances typically secreted during tubular secretion: Common substances secreted include hydrogen ions, potassium ions, and certain drugs or toxins. These are actively transported into the tubular fluid.

Consider the role of hydrogen ions: Hydrogen ions are secreted to help regulate the body's pH balance. This is crucial for maintaining homeostasis and preventing acidosis.

Evaluate the other substances listed: Sodium ions, amino acids, and glucose are typically reabsorbed rather than secreted. Sodium ions are reabsorbed to maintain electrolyte balance, while amino acids and glucose are reabsorbed to conserve energy and nutrients.

Conclude with the correct answer: Based on the understanding of tubular secretion, hydrogen ions are indeed secreted during this process, aligning with the body's need to regulate pH levels.