Item #3 of 10

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 ____________.

		stimulants;
		inhibitors;
		neurotransmitters;
		ions;
		hormones;

INCORRECT - The substances released into the synaptic cleft are not called inhibitors, although some may act as inhibitors.

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