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

Which ion is the main extracellular cation in the human body?

Chloride (Cl-)

Sodium (Na+)

Potassium (K+)

Calcium (Ca2+)

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Verified step by step guidance

Understand the concept of cations and anions: Cations are positively charged ions, while anions are negatively charged ions. In the context of the human body, different ions play specific roles in physiological processes.

Identify the main extracellular cation: The extracellular fluid is the fluid outside of cells, and it contains various ions that are crucial for maintaining homeostasis and proper function of cells.

Recognize the role of sodium (Na+): Sodium is the primary extracellular cation in the human body. It is essential for maintaining fluid balance, nerve function, and muscle contraction.

Compare sodium with other ions: While potassium (K+) is the main intracellular cation, sodium (Na+) is predominant in the extracellular space. Calcium (Ca2+) and chloride (Cl-) also play important roles but are not the main extracellular cations.

Conclude with the importance of sodium: Sodium's role as the main extracellular cation is vital for processes such as action potentials in neurons and the regulation of blood pressure.