Matching Pairs Nervous SystemOnline version fives by Jocelyn Ochoa 1 chemicals in junction to allow impulses to be started in a second neuron 2 the in between sensory and motor neurons. 3 Primary cell of the nervous system that transmits impulses 4 carry messages from cns. Instructs the body to do something. 5 two main anatomical divisions of the nervous system 6 A small gap or space between the axon of one neuron and the dendrite of another 7 brings senses changes messages to CNS