Final answer:
The end part of an axon that connects to the next neuron is called the axon terminal, essential for signal transmission in the nervous system.
Step-by-step explanation:
Understanding Axon Terminals
The end part of an axon where it connects to the next neuron is known as the axon terminal. Also colloquially called a synaptic end bulb, this is where neurotransmitters are released to transmit the nerve impulses to the dendrites of the next neuron across a tiny gap known as the synaptic cleft. Neurons usually have one or two axons, each with their own axon terminals. The axon terminal represents the critical juncture between neurons, enabling the continuation of the neural signal.