Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 39m
3. Energy & Cell Processes10h 8m
4. Tissues & Histology10h 3m
5. Integumentary System2h 28m
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 System3h 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

What of the following is NOT found in the A band?

M Line.

H Zone.

Z Disc.

Areas with both actin and myosin.

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Verified step by step guidance

Understand the structure of a sarcomere, which is the functional unit of a muscle fiber. It is composed of repeating units between two Z discs.

Identify the A band within the sarcomere. The A band is the region that contains the entire length of the thick filaments (myosin) and overlaps with thin filaments (actin).

Recognize the components found within the A band: the M line, which is the center of the A band; the H zone, which is the region within the A band where there is no overlap of actin and myosin; and areas where actin and myosin overlap.

Note that the Z disc is not part of the A band. The Z disc is the boundary between adjacent sarcomeres and anchors the thin filaments.

Conclude that the Z disc is the correct answer to the question of what is NOT found in the A band, as it is located at the ends of the sarcomere, not within the A band itself.