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Resting Muscle Actin Myosin Binding Site Blocked Tropomyosin Myofilaments

In resting muscle, tropomyosin blocks actin-myosin binding sites, preventing cross-bridge formation.

In a resting muscle, tropomyosin blocks the actin-myosin binding sites, preventing the myosin heads from attaching to the actin filaments.

Front Resting muscle (actin-myosin binding site)
Back Blocked by tropomyosin so myofilaments can't slide past each other

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