Final answer:
The axon transmits electrical signals to target cells in a neuron.
Step-by-step explanation:
The part of a neuron that transmits an electrical signal to a target cell is the axon.
The axon is a long extension of the neuron that carries the action potential, or electrical signal, away from the cell body towards the synapse. It is wrapped in an insulating layer called myelin, which helps increase the speed of signal transmission.