Keywords
motor unit,alpha motor neuron,skeletal muscle fibers,skeletal muscle cell,striated muscle,multipolar neuron,large,peripheral nervous system,PNS,central nervous system,CNS,motor neuronmyelin sheath,neuron,myelin,sheath,myelinated,myelination,axon,peripheral nervous system,PNS,central nervous system,CNS,neurite,soma,dendrite,axon hillock