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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

Sliding Filament Theory and the Sacromere

Anatomy & Physiology

9. Muscle Tissue

Sliding Filament Theory and the Sacromere

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Multiple Choice

Which of the following best describes the sarcomere in the context of the sliding filament theory?

The sarcomere is the basic contractile unit of muscle fiber, defined by the area between two Z lines.

The sarcomere is a type of connective tissue that surrounds muscle fibers.

The sarcomere is a protein that binds to calcium ions to initiate muscle contraction.

The sarcomere is a neurotransmitter released at the neuromuscular junction.

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Verified step by step guidance

Understand the context of the sliding filament theory, which explains how muscles contract by the sliding of actin and myosin filaments within the muscle cell.

Identify the role of the sarcomere in muscle contraction. The sarcomere is the segment of a myofibril in striated muscle, defined by the area between two Z lines.

Recognize that the sarcomere is the basic contractile unit of muscle fiber, where the sliding of actin and myosin filaments occurs, leading to muscle contraction.

Differentiate the sarcomere from other components mentioned: it is not a type of connective tissue, a protein that binds calcium, or a neurotransmitter.

Conclude that the correct description of the sarcomere in the context of the sliding filament theory is that it is the basic contractile unit of muscle fiber, defined by the area between two Z lines.