olfactory epithelium

superior area

of nasal cavity

oflactory glands

secretes mucus through ducts to moisten/dissolves chemicals in air

olfactory receptor cells are

first oider, bipolar neurons

olfactory receptor cells

olfactory hairs respond to inhaled chemicals

supporting cells

detoxify chemicals, electrically insulate receptors, supports/nourishment

basal cells

divide to produce new olfactory receptor cells

odorant binding proteins of olfactory cell bind with

dissolved odorant

odorant binding proteins of olfactory cell produce

generator potential

odorant binding proteins of olfactory cell leads to

action potential if threshold

low threshold

few molecules needed to be perceived as odor

rapid adaptation decreases

sensitivity within secs after stimulation

olfactory nerves

bundles of axons from bipolar olfactory receptor cells

olfactory bulb

synapse of receptor cell axons c dendrites/cell bodies

olfactory tracts projected to cerebral cortex primay olfactory area

for awareness of smell

olfactory tracts projected to limbic system/hypothalamus

emotional/memory evoked responses

olfactory tracts projected from primary olfactory area to frontal lobe

odor identification/discrimination