silent_pain

hello guys, can someone plz explain to me what happens in a single muscle twitch and to be specific i wanna know how is it possible according to this diagramm that the myocyte keep contracting and reaches its Maximum contraction power after the calcium concentration drops???? and one more thing : superposition of 2 single twitches means more calcium concentration and thus more contraction power?? i would really appreciate it ur help guys :doh: thx