<unk> s are usually amitotic, but some, such as the olfactory sensory<unk> s, undergo adult<unk> enesis.<unk> s are typically composed of a soma, or cell body, a dendritic tree and an axon. The majority of vertebrate<unk> s receive input on the cell body and dendritic tree, and transmit output via the axon. However, there is great heterogeneity throughout the nervous system and the animal kingdom, in the size, shape and function of<unk> s.<unk> s communicate via chemical and electrical synapses, in a process known as synaptic transmission. The fundamental process that triggers synaptic transmission is the action potential, a propagating electrical signal that is generated by exploiting the electrically excitable membrane of the<unk> .  This is also known as a wave of depolarization.
Neuron
Interneuron
Oocyte
Immunoblast
Fibroblast
Dendrite
Cartilage
Neuroepithelial cell