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

The region of the sarcomere containing both thick and thin filaments is the:

I band

A band

H zone

Z disc

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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 filaments (myosin) and thin filaments (actin). These filaments are organized into specific regions.

Step 2: Learn the definitions of the key regions within the sarcomere: - The I band contains only thin filaments (actin). - The A band contains both thick filaments (myosin) and overlapping thin filaments. - The H zone is the central part of the A band that contains only thick filaments. - The Z disc is the boundary between adjacent sarcomeres and anchors the thin filaments.

Step 3: Focus on the question, which asks for the region containing both thick and thin filaments. Based on the definitions, the A band is the region where thick and thin filaments overlap.

Step 4: Eliminate incorrect options: - The I band contains only thin filaments, so it is not correct. - The H zone contains only thick filaments, so it is not correct. - The Z disc is a structural boundary and does not contain filaments in the overlapping arrangement, so it is not correct.

Step 5: Conclude that the correct answer is the A band, as it is the region of the sarcomere where both thick and thin filaments are present and overlap.