english: This flood of calcium causes  the muscle to contract by enabling proteins buried in the muscle  fibers to lock together and ratchet towards each other, pulling the muscle tight.
non_english: Taj priliv kalcijuma uzrokuje kontrakciju mišića tako što omogućava proteinima ukopanim u mišićnim vlaknima da se isprepletu i napinju jedni prema drugima, čime grče mišić.