Describe in detail as great a detail as possible the mechanismby which skeletal muscle cells contract. Start with
an action potential arriving at an axon terminal of a motorneuron and end with the completion of a single cross-
bridge cycle. Be sure you describe all the events and how theoperate, and name all the structures, ions, proteins,
molecules involved and explain the role each has. Use properterminology and explain what is happening at
each step. Then explain what has to occur in order for a musclecell to relax. This will require a full page.
