Someone ! how might a synapse be changed to be more efficient in transmissions? of what advantage is it to use a relatively small neurotransmitter molecule such as glutamate?

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e