____________ neurotransmitters make it more likely that a neuron will fire a message, whereas _____________ neurotransmitters make it less likely that a neuron will send its message
a) Excitatory; inhibitory
b) Inhibitory; excitatory
c) Augmentation; depletion
d) Depletion; augmentation
ANS: A, Excitatory neurotransmitters turn cells on and inhibitory ones turn cells off.
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Indicate whether this statement is true or false.