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Flashcards in Special Senses Deck (7)
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1

Glomeruli

Spherical tangles of sensory axon terminals from ORNs, synapses, and dendrites of olfactory bulb neurons

2

ORN Firing Mech

Odorant molecule binds R on ORN cilia, activates Golf, activates adenylyl cyclase -> cGMP -> opens cation channels for depol (Na and Ca) and Cl channels send Cl out to amplify depol

3

Key Diff b/w Taste and ORNs

Tastes don't have axons, just synapse there w/ afferent axons

4

Rs for Taste (2)

Sweet/bitter/umami: GPCR
Salty/sour: Ion channel

5

Taste Pathway

Afferent fibers synapse w/ taste buds, go to solitary nucleus, then thalamus, then insular cortex. Some projections go to orbitofrontal cortex to combine w/ olfaction for flavor

6

Kallman's Syndrome

Gonadotropin deficiency, most common cause of congenital anosmia

7

Ageusia

Absence of taste