[cellular_component] axon <sep> contractile muscle fiber <sep> cytoplasm <sep> dendrite <sep> dendritic spine <sep> growth cone <sep> membrane <sep> neuromuscular junction <sep> neuron projection <sep> neuronal cell body <sep> nucleus <sep> perikaryon <sep> perinuclear region of cytoplasm <sep> plasma membrane <sep> postsynaptic density <sep> protein kinase 5 complex