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

26. Fluid and Electrolyte Balance, Acid Base Balance

Electrolyte Balance

Anatomy & Physiology

26. Fluid and Electrolyte Balance, Acid Base Balance

Electrolyte Balance

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Multiple Choice

What is the most common cation found in the interstitial fluid?

Calcium (Ca2+)

Potassium (K+)

Magnesium (Mg2+)

Sodium (Na+)

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Verified step by step guidance

Understand the concept of interstitial fluid: Interstitial fluid is the fluid that surrounds the cells in tissues, providing them with nutrients and a means of waste removal. It is part of the extracellular fluid compartment.

Identify the role of cations in the body: Cations are positively charged ions that play crucial roles in various physiological processes, including nerve impulse transmission, muscle contraction, and maintaining fluid balance.

Review the common cations in the body: The major cations in the body include sodium (Na+), potassium (K+), calcium (Ca2+), and magnesium (Mg2+). Each has specific functions and distributions within the body's compartments.

Focus on sodium (Na+): Sodium is the most abundant cation in the extracellular fluid, which includes both plasma and interstitial fluid. It is essential for maintaining osmotic balance and fluid distribution.

Conclude that sodium (Na+) is the most common cation in interstitial fluid: Given its abundance and role in the extracellular fluid, sodium is the primary cation found in interstitial fluid, making it the correct answer.