Which of the following statements about synaptic events is TRUE:
A. presynaptic terminals usually do not contain mitochondria
B. calcium influx is not essential for synaptic transmission
c. transmitters in the synaptic gap can be inactivated by diffusion
D. sodium influx is essential for transmitter release
E. a major excitatory transmitter is GABA
Ans: c. transmitters in the synaptic gap can be inactivated by diffusion
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