What part of a neuron forms a junction with a neighboring cell to communicate?

The part of a neuron that forms a junction with a neighboring cell to communicate is called DENDRITES.

Explanation:

Neurons are specialized cells that are found in the central nervous system, their major function is to transmit chemical and electrical signals in the brain. A typical neuron is made up of the following body parts: cell body, axon, dendrites and synapses. Each of these body parts have their specific functions.

The dendrites is the part that is responsible for receiving messages from other neurons. The dendrites are branch-like structure that extend away form the body of neurons. Some neurons have no dendrites while others have multiple dendrites.

The synapse refers to the chemical junction between the axon of one neuron and the dendrites of the receiving neuron. Specialized chemical interactions occurs in this chemical junction when messages are been passed to other neurons via dendrites.  

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