Connecting the olfactory bulb and the nasal cavity is the olfactory nerve. Some researchers worry the olfactory pathway may also be an entry point for microplastics getting into the brain ...

Seven primary odors are distinguished, each of them by an appropriately shaped receptor at the olfactory nerve endings By John E. Amoore , James W. Johnston Jr. & Martin Rubin Join Our Community ...

Early research had suggested that each neuron expresses just one type of receptor, and that all the neurons expressing a particular receptor link to a dedicated olfactory nerve cluster (called a ...