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Nerve cells called motor neurons control the skeletal muscles. Each motor neuron controls several muscle cells in a group known as a motor unit. When a motor neuron receives a signal from the brain, it stimulates all of the muscles cells in its motor unit at the same time.
Somatic and Autonomic Motor Neurons Somatic Autonomic voluntary effectors: involuntary effectors: striated muscles smooth & cardiac muscles, glands single motor neuron usually 2 neurons with synapse from spinal cord (ganglion) between from to target organ spinal cord to target organ NT always stimulatory NT stimulatory or inhibitory