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

Introduction to Muscles and Muscle Tissue

Anatomy & Physiology

9. Muscle Tissue

Introduction to Muscles and Muscle Tissue

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Multiple Choice

The region of the sarcomere containing the thick filaments is the:

H zone

I band

Z disc

A band

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Verified step by step guidance

Step 1: Understand the structure of a sarcomere, which is the functional unit of a muscle fiber. It is composed of repeating units of thick and thin filaments organized in a specific pattern.

Step 2: Recall that thick filaments are primarily composed of the protein myosin, while thin filaments are composed of actin. These filaments overlap in certain regions of the sarcomere.

Step 3: Review the specific regions of the sarcomere: the H zone contains only thick filaments, the I band contains only thin filaments, the Z disc is the boundary between sarcomeres, and the A band contains the entire length of the thick filaments, including areas of overlap with thin filaments.

Step 4: Focus on the A band, which is the region of the sarcomere that spans the full length of the thick filaments. It includes both the overlapping area with thin filaments and the central region where only thick filaments are present.

Step 5: Conclude that the correct answer is the A band, as it is the region of the sarcomere containing the thick filaments.