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

Which of the following structures marks the boundary between adjacent sarcomeres in skeletal muscle tissue?

Z disc (Z line)

H zone

M line

A band

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Verified step by step guidance

Understand the structure of a sarcomere: A sarcomere is the functional unit of skeletal muscle tissue, composed of repeating units of actin (thin filaments) and myosin (thick filaments). It is bounded by specific structures that define its limits.

Learn the role of the Z disc (Z line): The Z disc is a dense protein structure that marks the boundary between adjacent sarcomeres. It anchors the thin filaments (actin) and connects sarcomeres end-to-end, ensuring structural integrity during muscle contraction.

Clarify the function of the H zone: The H zone is the central region of the sarcomere where only thick filaments (myosin) are present. It does not mark the boundary between sarcomeres but is part of the internal structure of a single sarcomere.

Understand the M line: The M line is located in the center of the sarcomere and serves as an anchoring point for the thick filaments. It does not define the boundary between sarcomeres.

Learn about the A band: The A band is the region of the sarcomere that contains the entire length of the thick filaments, including areas of overlap with thin filaments. It is not involved in marking the boundary between sarcomeres.