An impulse transmitter is a type of device that sends electrical signals from one neuron to another. The three crossword solutions for this term are axon (4 letters), NERVE (5 letters), and neuron (6 letters). An axon is a long, thin fiber that carries electrical signals away from the cell body of a neuron. A NERVE is a bundle of axons that transmits signals between the central nervous system and other parts of the body. Finally, a neuron is a specialized cell that transmits electrical signals throughout the body.