Odor molecules are detected by the olfactory receptors (hereafter OR) in the olfactory epithelium of the nasal cavity. Each receptor type is expressed within a subset of neurons, from which they directly connect to the olfactory bulb in the brain.
Odor molecules are detected by the olfactory receptors (hereafter OR) in the olfactory epithelium of the nasal cavity. Each receptor type is expressed within a subset of neurons, from which they directly connect to the olfactory bulb in the brain.
Source: Wikipedia "Evolution of olfaction" · CC BY-SA 4.0
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