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Key Points. 1  Dendrites are the tree-like structures in neurons that extend away from the cell body to receive messages from other neurons at synapses; not all neurons have dendrites. 2  Synapses enable the dendrites from a single neuron to interact and receive signals from many other neurons.
The purpose of the nervous system is to transfer information from the PNS to the CNS, process the information in the CNS, and send back information to the PNS. This transfer of information from the external environment, through neurons, and back again to the external environment is known as neuronal signaling.A summary of neuronal signaling: Before a neuron receives a signal, it is in a resting state Neurons receive signals in two forms: Chemical changes.This is done via neurotransmitters (see Synaptic Transmission below) or chemical elements in the environment (e.g., olfactory receptors) Physical changes.his transfer of information from the external environment, through neurons, and back again to the external environment is known as neuronal signaling.