★ Musculoskeletal System Responses to Exercises Quiz
What is the role of calcium ions in muscle contraction?
A. Initiate muscle relaxation
B. Activate troponin to expose binding sites on actin
C. Generate ATP for cross-bridge formation
D. Stabilize the sarcomere structure
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What is the primary function of the sliding filament theory in muscle action?
A. Describe muscle fiber types
B. Explain muscle damage
C. Analyze muscle fatigue
D. Convert nervous impulse into muscle contraction
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