The figure below shows an electron micrograph of a chemical synapse in the cerebral cortex.  Which statement about this synapse is accurate?单项选择题

A

a) Inside the postsynaptic neuron are synaptic vesicles, which fuse with the membrane in the postsynaptic density.

B

b) Inside the presynaptic neuron are synaptic vesicles, which fuse with the membrane in the active zone.

C

c) Inside the presynaptic neuron are synaptic vesicles, which fuse with the membrane in the postsynaptic density.

D

d) A gap junction connects the two neurons via connexons that span the pre- and postsynaptic membranes.

E

e) None of the above

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Refer to the figure. The figure shows an electron micrograph of a chemical synapse in the cerebral cortex. Which statement about this synapse is accurate?

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