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

9. Muscle Tissue

Structure of a Skeletal Muscle

Anatomy & Physiology

9. Muscle Tissue

Structure of a Skeletal Muscle

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Multiple Choice

What protein are the thick filaments in skeletal muscle primarily composed of?

Myosin

Troponin

Actin

Tropomyosin

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Verified step by step guidance

Understand the structure of skeletal muscle: Skeletal muscle is composed of repeating units called sarcomeres, which are the basic functional units of muscle fibers.

Identify the components of a sarcomere: Each sarcomere contains thick and thin filaments. The thick filaments are primarily composed of a specific protein.

Recognize the proteins involved: The main proteins in muscle contraction are myosin, actin, troponin, and tropomyosin.

Determine the role of each protein: Myosin is the motor protein that forms the thick filaments and is responsible for muscle contraction by interacting with actin, which forms the thin filaments.

Conclude which protein forms the thick filaments: Based on the roles of the proteins, myosin is the protein that primarily composes the thick filaments in skeletal muscle.