Question

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what happens when an electrical signal reaches the end of a neuron?
it triggers the release of hormones
it causes the neuron to produce glucose.
it triggers the release of neurotransmitters.
it activates a dormant gene in the neurons dna.
it causes the neuron to divide into two smaller neurons.

Explanation:

When an electrical signal (action - potential) reaches the end of a neuron (axon terminal), it causes voltage - gated calcium channels to open. Calcium ions enter the neuron, which triggers the release of neurotransmitters from synaptic vesicles into the synaptic cleft. Neurotransmitters are used to communicate with other neurons or target cells. Hormones are released by endocrine glands, neurons do not produce glucose as a response to an electrical signal, genes are not typically activated in this way by an electrical signal at the axon terminal, and neurons do not divide into smaller neurons in response to an electrical signal.

Answer:

It triggers the release of neurotransmitters.