Completar frases Muscle contraction stepsVersión en línea order and explanation of muscle contractions por Rachel Beal 1 neuromuscular Acetylcholine glycogen actin junctio myosin sacromeres energy ATP is released from a neuron ending into the synaptic cleft at the 2 potassium calcium bridges Acetylcholine cross cytoplasm ATP receptors binds to and stimulates the action potentia l 3 energy channels tubules stimulation actin contraction calcium potassium troponin sarcoplasmic T reticulu The action potential travels down the sarcolemma and - and activates the in the 4 actin potassium myosin cell muscl muscle calcium ATP The sarcoplasmic reticulum releases into the 5 troponin tropomyosin actin potassium ATP glycogen acetylcholine calcium Calcium myosin binds to which shifts so that binding sites on are expose d 6 potassium bridge troponin calcium action-potential cross ATP Myosin heads bind to actin , forming - 7 sarcomeres potassium muscle cell sarcoplasmic reticulum neuromuscular junction calcium cytoplasm actin Using the chemical energy contained in ATP , myosin heads pull filaments together within the , and shorten s 8 cytoplasm myosin calcium muscle actin sarcoplasmic reticulum heads ends potassium ATP New is used to detach and move them back into position for another power strok e 9 calcium reticulu actin sarcoplasmic atp action potential ends muscle moves energy potassium begins The relaxes when stimulation , and the is pumped back into the
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