Nerve impulses (action potentials) are electrical current that travels through the nerve cells that is directed to the nervous system that will eventually produce information. This information is processed in the brain for certain response or action. The transmission of nerve impulses starts with the activation of the nerve cell by changing the voltage across the wall of the axon of the nerve cell. This change in the voltage is due to the charges of ions in and out of the nerve cell. As the signals are transferred from the dendrites to the axon, a receiving nerve cell is waiting for the signals to be transferred. The axons of the first nerve cell transfer its signals through the release of neurotransmitters to be received by the dendrites of the next nerve cell. This phenomenon happens in the synapse.