Word Origin and History for philo- Expand. before vowels phil-, word-forming element meaning loving, fond of, tending to, from Greek philo-, comb. form of philos dear (adj.), friend (n.), from philein to love, of unknown origin. Productive of a great many compounds in ancient Greek.
One way to classify neurons is by the number of extensions that extend from the neuron's cell body (soma). Bipolar neurons have two processes extending from the cell body (examples: retinal cells, olfactory epithelium cells).
1 Underneath the mucus, in the olfactory epithelium, specialized receptor cells called olfactory receptor neurons detect the odor. 2  These neurons are capable of detecting thousands of different odors. 3  The olfactory receptor neurons transmit the information to the olfactory bulbs, which are located at the back of the nose. Underneath the mucus, in the olfactory epithelium, specialized receptor cells called olfactory receptor neurons detect the odor. 2  These neurons are capable of detecting thousands of different odors. 3  The olfactory receptor neurons transmit the information to the olfactory bulbs, which are located at the back of the nose.