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

4. Tissues & Histology

Introduction to Muscle Tissue

Anatomy & Physiology

4. Tissues & Histology

Introduction to Muscle Tissue

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Multiple Choice

In skeletal muscle, the distance between the ends of the thin filaments within a sarcomere is known as which of the following?

A band

H zone

I band

Z disc

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Verified step by step guidance

Understand the structure of a sarcomere, which is the functional unit of skeletal muscle. It is composed of thick filaments (myosin) and thin filaments (actin) arranged in a repeating pattern.

Learn the key regions of the sarcomere: the A band (contains the entire length of thick filaments), the I band (contains only thin filaments), the Z disc (marks the boundary between adjacent sarcomeres), and the H zone (the central region of the A band where there are only thick filaments and no overlap with thin filaments).

Focus on the H zone, which is the area within the A band where the thin filaments do not extend. This is the region where the distance between the ends of the thin filaments is measured.

Compare the definitions of the options provided: A band includes the thick filaments, I band includes only thin filaments, Z disc is the boundary, and H zone is the gap between thin filaments within the A band.

Conclude that the correct answer is the H zone, as it specifically refers to the distance between the ends of the thin filaments within the sarcomere.