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The mechanism by which the neurotransmitter is returned to a presynaptic neuron's axon terminal is specific for each neurotransmitter. Which of the following neurotransmitters is broken down by an enzyme before being returned?

User Linclark
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Yes, acetylcholine is broken down by acetylcholinesterase before being returned to the presynaptic neuron's axon terminal.
User Nuno Costa
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