Which of the Following Is NOT Always True of Neurotransmitters

Multiple Choice

Which of the following is NOT always true of neurotransmitters?

A) They are synthesized in the axon terminals of the presynaptic neuron.
B) They are released by the presynaptic neuron when action potentials depolarize its axon terminal.
C) They bind to receptors on the membrane of the postsynaptic neuron.
D) Applying a neurotransmitter artificially to the postsynaptic neuron would lead to the same response as stimulating the presynaptic neuron.