The flow of signals in a synapse from the axonal end of one neuron to the dendritic end of another neuron takes place but not in the reverse direction. Explain.

A nerve impulse travels in the form of an electrical charge from a neuronal axon end to the synapse. Here, the electrical impulse is converted to the chemical impulse in the synaptic cleft. Further, this nerve impulse flows from the synaptic cleft to dendritic tips, which converts the chemical impulse to an electrical impulse. The neurotransmitters required are synthesised only by axon terminals, and the receptors required to detect these chemical transmitters are only present on the dendritic ends. Thus, the impulse always flows from one axonal end of a neuron to another dendron head of a neuron.