Table of contents

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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

2. Cell Chemistry & Cell Components

Introduction to Biomolecules

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Introduction to Biomolecules

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Multiple Choice

What is the primary function of sodium and potassium ions in the body?

They are essential for maintaining the body's acid-base balance.

They are the main components of bone structure.

They play a crucial role in nerve impulse transmission and muscle contraction.

They are primarily involved in the synthesis of proteins.

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Verified step by step guidance

Understand that sodium (Na⁺) and potassium (K⁺) ions are electrolytes, which are essential for various physiological processes in the body.

Recognize that these ions are crucial for maintaining the electrical gradient across cell membranes, which is vital for nerve impulse transmission.

Learn that the sodium-potassium pump (Na⁺/K⁺ ATPase) actively transports sodium out of cells and potassium into cells, creating an electrochemical gradient.

Explore how this gradient is used to propagate action potentials in neurons, allowing for communication between nerve cells.

Understand that the same electrochemical gradient is important for muscle contraction, as it helps in the depolarization and repolarization of muscle cells, leading to contraction and relaxation.