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 H band of the sarcomere?

The region that includes the Z line

The region containing only thick filaments

The region where thick and thin filaments overlap

The region containing only thin filaments

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Verified step by step guidance

Understand the structure of a sarcomere: A sarcomere is the basic contractile unit of muscle fiber, composed of thick and thin filaments. The thick filaments are primarily made of myosin, while the thin filaments are primarily made of actin.

Identify the different bands and lines within a sarcomere: The sarcomere is divided into several regions, including the A band, I band, H band, Z line, and M line. Each of these regions has specific characteristics based on the arrangement of thick and thin filaments.

Define the H band: The H band is a region within the A band of the sarcomere. It is characterized by containing only thick filaments (myosin) and is located in the center of the A band.

Differentiate the H band from other regions: Unlike the A band, which includes both thick and thin filaments, the H band contains only thick filaments. The I band contains only thin filaments, and the Z line is the boundary between adjacent sarcomeres.

Conclude with the correct identification: Based on the sliding filament theory and the structure of the sarcomere, the H band is the region containing only thick filaments.