肌丝滑行的过程(ideo Ca2+channel open Ca2+released from cisternae into sarcoplasm Ca2+binds to troponin Tropomyosin moves and exposing myosin binding site on actin Cross bridge bind to actin,and hydrolysis of ATP provides energy Cross bridge pivoting Sarcoma shortenSarcoma shorten Cross bridge pivoting Cross bridge bind to actin,and hydrolysis of ATP provides energy Ca2+binds to troponin Ca2+ channel open Ca2+released from cisternae into sarcoplasm 肌丝滑行的过程(video) Tropomyosin moves and exposing myosin binding site on actin