Which of the following processes does not involved in the signal propagation at a chemical synapse?<br/>16. (Part 06, medium) 105-Mid A: synaptic vesicles release neurotransmitters in the presynaptic terminal. B: neurotransmitters diffuse across the synaptic clef. C: Postsynaptic receptors are activated by the neurotransmitters. D: Vesicles transport neurotransmitters from the synaptic terminals to the soma in the postsynaptic side.

The amino acids that can serve as neurotransmitters include A: Asp B: Asn C: Glu D: Gly E: Gln