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

Introduction to the Urinary System

Anatomy & Physiology

25. The Urinary System

Introduction to the Urinary System

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Multiple Choice

The greatest output of electrolytes is due to the function of the ______.

intestines

skin

kidneys

lungs

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Verified step by step guidance

Understand the role of electrolytes in the body: Electrolytes are ions like sodium (Na⁺), potassium (K⁺), chloride (Cl⁻), and bicarbonate (HCO₃⁻) that are essential for maintaining fluid balance, nerve function, and muscle contraction.

Identify the organs involved in electrolyte regulation: The intestines, skin, lungs, and kidneys all play roles in maintaining electrolyte balance, but their contributions differ in magnitude and function.

Analyze the function of the kidneys: The kidneys are the primary organs responsible for filtering blood, reabsorbing necessary electrolytes, and excreting excess electrolytes through urine. This makes them the greatest contributors to electrolyte output.

Compare the roles of other organs: The intestines absorb electrolytes from food, the skin loses small amounts of electrolytes through sweat, and the lungs regulate acid-base balance by exhaling carbon dioxide (which indirectly affects bicarbonate levels). However, none of these organs match the kidneys in electrolyte output.

Conclude that the kidneys are the correct answer: Based on their primary role in filtering and excreting electrolytes, the kidneys are the organ responsible for the greatest output of electrolytes.