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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

What does the sliding filament theory describe?

The mechanism by which calcium ions are released from the sarcoplasmic reticulum.

The process by which actin and myosin filaments slide past each other to shorten the sarcomere during muscle contraction.

The way in which ATP is synthesized in muscle cells.

The process of nerve impulse transmission across the neuromuscular junction.

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Verified step by step guidance

The sliding filament theory is a fundamental concept in muscle physiology that explains how muscles contract to produce force.

Begin by understanding the structure of a sarcomere, the basic unit of a muscle fiber, which contains actin (thin) and myosin (thick) filaments.

During muscle contraction, the myosin heads bind to specific sites on the actin filaments, forming cross-bridges.

The myosin heads then pivot, pulling the actin filaments toward the center of the sarcomere, which shortens the sarcomere and generates contraction.

This process is powered by ATP, which is hydrolyzed to provide the energy needed for the myosin heads to detach, re-cock, and bind again, allowing the cycle to repeat.