Sliding Filament Theory of Muscle Contraction — NEET Biology
📚 Practice ConceptMechanism of muscle contraction is best explained by the sliding filament theory which states that contraction of a muscle fibre takes place by the sliding of the thin filaments over the thick filaments.
Q12. A swimmer performing repeated overhead strokes develops early shoulder fatigue. Which statements are correct? I. Primary movement occurs at a synovial ball-and-socket joint of the appendicular skeleton. II. Early fatigue is more likely if white fibres predominate due to fewer mitochondria and reliance on anaerobic metabolism. III. Shoulder mobility is enhanced because the scapula and humerus are joined by fibrous sutures. IV. Force for locomotion arises from sliding of thin filaments over thick filaments in voluntary skeletal muscle.
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