Dendrite: a nerve fiber that carries messages toward the cell body.
Axon: a nerve fiber that carries messages away from the cell body.
Synapse: the gap between neurons.
Sensory neuron: a nerve cell that picks up stimuli and sends impulse produced by the stimuli to the brain and spinal cord.
Stimulus: anything that causes a response.
Motor neuron: a nerve cell that carries commands from the brain and spinal cord to the muscle and glands.
Associative neuron: a nerve cell that passes impulse from sensory to the motor neurons.
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