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

Sliding Filament Theory and the Sacromere

Anatomy & Physiology

9. Muscle Tissue

Sliding Filament Theory and the Sacromere

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Multiple Choice

In the context of the sliding filament theory, what is the shape of a myosin filament?

A long rod with globular heads

A flat sheet

A double helix

A spherical ball

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Verified step by step guidance

Understand the sliding filament theory: This theory explains how muscles contract by the sliding of actin and myosin filaments past each other, leading to muscle shortening.

Identify the structure of myosin: Myosin is a protein that plays a crucial role in muscle contraction. It is composed of a long rod-like tail and two globular heads.

Visualize the myosin filament: The myosin filament is structured as a long rod with globular heads that protrude from the rod. These heads are essential for binding to actin filaments during muscle contraction.

Compare the options: Evaluate the given options based on the structure of myosin. A long rod with globular heads accurately describes the myosin filament, while the other options do not match its structure.

Conclude the correct shape: Based on the sliding filament theory and the structure of myosin, the correct shape of a myosin filament is a long rod with globular heads.