<prompt> Skeletal muscle contraction ends whenIons move out of cytoplasmAch is absorbed frm the nmjClosure and indrawing of receptorsDecreased calcium outside reticulum  <response>: Muscle contraction ends usually when signals from motor neuron stops which repolarises sarcolemma and closes voltage gated calcium channals in sarcoplasmic reticulum. Ref:Guyton and Hall textbook of medical physiology 12th edition,page number:82,83 