Axon terminals are the small, bulbous endings of axons, which are long, slender projections of neurons. These terminals play a crucial role in transmitting signals between neurons. When an electrical impulse travels down the axon, it reaches the axon terminal, where it triggers the release of chemical messengers called neurotransmitters. These neurotransmitters cross the gap, or synapse, between neurons and bind to receptors on the next neuron, allowing the signal to continue. This process is essential for communication within the nervous system, influencing everything from muscle movement to mood regulation.