Item #9 of 10

Which of the following are true for excitatory neurotransmitters?

They open chloride channels on the postsynaptic membrane.;
They open sodium channels on the postsynaptic membrane.;
They induce threshold depolarization across the postsynaptic membrane.;
They induce chloride ion influx through the postsynaptic membrane.;
Alternatives a, c, and d are correct.;

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