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

10. Muscles

Muscle Actions

Anatomy & Physiology

10. Muscles

Muscle Actions

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Multiple Choice

Which type of muscle acts to stabilize the origin of a prime mover and help maintain upright posture?

Synergists

Antagonists

Agonists

Fixators

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Verified step by step guidance

Understand the role of muscles in movement: Muscles work in groups to produce movement, stabilize joints, and maintain posture. Each type of muscle has a specific role in this process.

Define the term 'prime mover': The prime mover, also known as the agonist, is the muscle primarily responsible for producing a specific movement.

Explain the role of fixators: Fixators are specialized muscles that stabilize the origin of the prime mover. By anchoring the bone or joint, they prevent unnecessary movement and allow the prime mover to work efficiently.

Relate fixators to posture: Fixators are crucial for maintaining upright posture because they stabilize the spine and other key structures, ensuring the body remains balanced and aligned.

Compare fixators to other muscle types: Synergists assist the prime mover, antagonists oppose the prime mover, and agonists are the prime movers themselves. Fixators differ because their primary role is stabilization rather than movement.