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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