Olfactory (smell) sensory neurons have cilia (tiny hairs) in the epithelium containing receptors that bind to odor molecules dissolved in the mucus causing an electrical response with information about the odor to the brain's limbic system in a process called sensory transduction. [Purves D, Augustine GJ, Fitzpatrick D, et al., eds. (2001), "The Organization of the Olfactory System", Neuroscience (2nd ed.), Sunderland, MA: Sinauer Associates, retrieved 7 August 2016] #medicine

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