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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.
Sensory neurons typically have a long dendrite and short axon, and carry messages from sensory receptors to the central nervous system. Motor neurons have a long axon and short dendrites and transmit messages from the central nervous system to the muscles (or to glands). Interneurons are found only in the central nervous system where they connect neuron to neuron. Structure of a neuron and the direction of nerve message transmission.