Rank the sequence of events in excitation-contraction coupling from first to last.
The events of excitation-contraction coupling start with the junctional folds and sarcolemma, a transition to the T tubules and sarcoplasmic reticulum, and finally act at the sarcomere.
calcium ions bind to troponin.
tropomyosin moves off of acting binding sites
depolarization of the junctional folds triggers an action potential
troponin changes shape
action potential travels along the sarcolemma
action potential along the t tubules opens calcium channels
calcium ions flood the sarcoplasm
myosin heads from bridges
