The structure on which most neuron to neuron communications occur is; Choice A; Structure 1.
Neuron to neuron communications occur at junctions called synapses. At the synapse, a neuron interacts, more specifically, sends a message to another neuron. The synapses in discuss communicate using chemical messengers.
Remark;
A) 1
B) 2
C) 4
D) 3
E) 5
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