Item #2 of 15

Which of the following is(are) NOT true of all neurotransmitters?

They are biochemicals.;
They are stored in synaptic vesicles;
They are released into the synaptic cleft;
They affect the postsynaptic membrane;
They increase the likelihood that the next neuron will fire;

[Review Part 1 of the tutorial] [Review Part 2 (Matching) of the tutorial]