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Explain how the neurotransmitter acetylcholine is removed from the synaptic cleft.Multiple choice question.It diffuses away.It is taken up by the presynaptic terminal.It is taken up by the postsynaptic cell.It is broken down by the enzyme acetylcholinesterase.

Question

Explain how the neurotransmitter acetylcholine is removed from the synaptic cleft.Multiple choice question.It diffuses away.It is taken up by the presynaptic terminal.It is taken up by the postsynaptic cell.It is broken down by the enzyme acetylcholinesterase.

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Solution

The neurotransmitter acetylcholine is removed from the synaptic cleft by being broken down by the enzyme acetylcholinesterase. This enzyme rapidly breaks down acetylcholine into its constituent parts, acetate and choline, which can then be taken back up into the presynaptic neuron to be reused. This process is essential for ensuring that the signal sent by the neurotransmitter is not prolonged unnecessarily. So, the correct answer is "It is broken down by the enzyme acetylcholinesterase."

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