Table of contents

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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

Steps of Muscle Contraction

Anatomy & Physiology

9. Muscle Tissue

Steps of Muscle Contraction

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Multiple Choice

Which of the following is not a step of skeletal muscle contraction?

ATP is hydrolyzed to ADP and inorganic phosphate

Myosin heads bind to actin forming cross-bridges

Calcium ions bind to troponin

Oxygen binds to myoglobin

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Verified step by step guidance

Begin by understanding the process of skeletal muscle contraction, which involves several key steps.

Recognize that ATP hydrolysis to ADP and inorganic phosphate is crucial for energizing the myosin heads, allowing them to bind to actin.

Identify that myosin heads binding to actin to form cross-bridges is a fundamental step in muscle contraction, enabling the sliding filament mechanism.

Understand that calcium ions binding to troponin is essential for exposing the binding sites on actin, allowing myosin heads to attach.

Note that oxygen binding to myoglobin is not directly involved in the contraction process itself; rather, it is related to oxygen storage and transport within muscle cells.