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).
Olfactory receptors expressed in the cell membranes of olfactory receptor neurons are responsible for the detection of odor molecules.ctivated olfactory receptors are the initial player in a signal transduction cascade which ultimately produces a nerve impulse which is transmitted to the brain.