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

11. Nervous Tissue and Nervous System

Ions - Sodium and Potassium

Anatomy & Physiology

11. Nervous Tissue and Nervous System

Ions - Sodium and Potassium

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Multiple Choice

Which of the following is true with regard to sodium and potassium in the human body?

Sodium is the main extracellular cation, while potassium is the main intracellular cation.

Both sodium and potassium are equally concentrated inside and outside of cells.

Potassium is crucial for nerve impulse transmission, while sodium is not involved.

Sodium is primarily found inside cells, while potassium is found outside.

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Verified step by step guidance

Understand the role of sodium and potassium in the human body: Sodium (Na+) and potassium (K+) are essential electrolytes that play critical roles in maintaining cellular function, fluid balance, and nerve impulse transmission.

Identify the distribution of sodium and potassium: Sodium is the main extracellular cation, meaning it is primarily found outside of cells, while potassium is the main intracellular cation, meaning it is primarily found inside cells.

Consider the concentration gradients: Sodium and potassium have different concentrations inside and outside of cells, which is crucial for processes like nerve impulse transmission and muscle contraction.

Evaluate the role of potassium in nerve impulse transmission: Potassium is indeed crucial for nerve impulse transmission, as it helps in repolarizing the nerve cell membrane after an action potential.

Clarify the involvement of sodium in nerve function: Sodium is also involved in nerve impulse transmission, as it is responsible for depolarizing the nerve cell membrane during an action potential.