When a neural impulse reaches the end of an axon, it causes the tiny sacs at the end of the axon to release chemicals called ____________.
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stimulants; |
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inhibitors; |
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neurotransmitters; |
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ions; |
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hormones; |
INCORRECT - The substances released into the synaptic cleft are not called ions, although ions are essential to the membrane changes that underlie synaptic transmission.
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