PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Sliding Filament Theory of Contraction
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Excitation-Contraction Coupling
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Nerve Stimulus Theory
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Acetycholine Theory of Muscle Activity
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Detailed explanation-1: -The sliding filament theory explains the process of muscle contraction during which the thin filaments slide over the thick filaments, which shortens the myofibril . Each muscle fibre has an alternate light and dark band, which contains a special contractile protein, called actin and myosin respectively.
Detailed explanation-2: -During contraction, the myosin heads extend from the thick filament surface and attach to actin in the thin filaments, causing the filaments to slide past each other in a cyclic, ATP-driven process.
Detailed explanation-3: -The sliding filament model describes the process used by muscles to contract. It is a cycle of repetitive events that causes actin and myosin myofilaments to slide over each other, contracting the sarcomere and generating tension in the muscle.