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

9. Muscle Tissue

Introduction to Muscles and Muscle Tissue

Anatomy & Physiology

9. Muscle Tissue

Introduction to Muscles and Muscle Tissue

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Multiple Choice

How do muscles work in antagonistic pairs?

Both muscles relax simultaneously to allow movement.

One muscle relaxes while the other remains inactive.

Both muscles contract simultaneously to stabilize a joint.

One muscle contracts while the other relaxes to produce movement.

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Verified step by step guidance

Understand the concept of antagonistic pairs: Muscles often work in pairs called antagonistic pairs, where one muscle contracts while the other relaxes to produce movement.

Identify the roles of the muscles in the pair: In an antagonistic pair, one muscle is the 'agonist' that contracts to create movement, while the other is the 'antagonist' that relaxes to allow the movement.

Consider an example: For instance, when you bend your elbow, the biceps muscle (agonist) contracts, and the triceps muscle (antagonist) relaxes.

Visualize the movement: Imagine the action of bending and straightening your arm. When you straighten your arm, the roles reverse; the triceps contract and the biceps relax.

Apply this understanding to other muscle pairs: This principle of one muscle contracting while the other relaxes applies to various muscle pairs throughout the body, facilitating smooth and controlled movements.