Question

what is a type of chemical released from the tip of an axon into the synaptic cleft when a nerve impulse arrives
GPT 3.5
The type of chemical released from the tip of an axon into the synaptic cleft when a nerve impulse arrives is called a neurotransmitter. Some examples of neurotransmitters include acetylcholine, dopamine, serotonin, and norepinephrine.