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8 Cards in this Set

  • Front
  • Back

Olfactory epithelium

amucous membrane situated along top of nasal cavity which contains 10m olfactoryreceptor neurons

Olfactory receptor neurons(ORN)

eceptorcells that initiate the sense of smell. Odorant molecules bind to these siteson receptors embedded in the epithelium and if enough bindings occur, ORN sendaction potentials to olfactory nerve. (350 different types to discriminate10,000 odourants)

Receptor is Lock

Odourant is Key

Olfactory Bulb:

abrain structure located above the nasal cavity beneath the frontal lobes, sendsoutputs to various centers in the brain including the parts that areresponsible for controlling basic drives, emotions and memories

Pheromones

biochemicalodourants emitted by other members of its species that can affect an animal'sbehaviour or physiology (smell of their own children)

Cross-modalintegration with taste

losesense of smell, things don't taste the same)(not uncommon after suffering asevere brain injury, sense of smell starts in sinuses and then goes to brain,if pathways damages, cannot smell)

Changes with age

epitheliumcells are less likely to be replaced when you are older

Amnosia

Cannot smell due to brain injury