Question

the figure shows an electron micrograph of a chemical synapse in the cerebral cortex. which statement about this synapse is accurate? inside the postsynaptic neuron are synaptic vesicles, which fuse with the membrane in the postsynaptic density. inside the presynaptic neuron are synaptic vesicles, which fuse with the membrane in the active zone. inside the presynaptic neuron are synaptic vesicles, which fuse with the membrane in the postsynaptic density. none of the above a gap junction connects the two neurons via connexons that span the pre - and postsynaptic membranes.

Explanation:

In a chemical synapse, synaptic vesicles are located inside the presynaptic neuron. When an action - potential reaches the presynaptic terminal, these vesicles fuse with the membrane in the active zone and release neurotransmitters into the synaptic cleft. Gap junctions are different from chemical synapses and use connexons to connect cells, but this is not relevant to the description of chemical synapses in the question.

Answer:

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