Gustatory Flashcards
Taste cells are innervated by afferent gustatory neurons, whose fibers project into the CNS via what nerves?
CN VII, IX and X
The cell bodies for the afferent gustatory neurons are located within what ganglia
geniculate, petrosal, and nodose ganglia
Gustatory afferent fibers synapse within the gustatory region of the nucleus of the _______
solitary tract
tastant identification is preserved through ________ of this sensory information
Labeled line transmission
gustation: the sensation of taste, via detection of _____ in the foods and liquids that we ingest
tastants
_____ which results from a combination of inputs from the gustatory, olfactory, and somatosensory systems
“flavor”
Taste buds are clustered within ______ along the tongue
papillae
Each taste bud contains _____ gustatory (taste) cells
50-150
each gustatory cell presents receptors for _____
specific tastants
each gustatory cell is innervated by a __________
gustatory neuron
gustatory neuron, whose axon travels in Through what cranial nerve?
CNVII,IX, or CNX
T/F gustatory cells are neurons
False
T/F gustatory neurons are neurons
True
In response to tastan results in release of ______ triggering action potential
neurotransmitter
What kind of tissue are gustatory cells?
Modified epithelium,
Gustatory cells can have receptors to which specific tastants serve as____
ligands
Gustatory cells can have ____ that provide conductance for specific tastants to enter the taste cell
ion channels
individual tastant molecules are sensed via ion channels or metabotropic receptors along the a _______
apical membrane
______ increases in response to tastant-stimulation
cytosolic [Ca++]
sweet, umami, and bitter are transduced via______
membrane receptors
an afferent signal can be traced to a receptor
Labeled line
What are the three neurotransmitters that can be releases from receptor cells
Serotonin
ATP
GABA
________ channels admit an influx of Na+ that depolarizes the membrane
amiloride-sensitive Na+
H+ ions diffuse through a _______
H+-permeant proton channel
taste cell membrane ______ in response to salty and sour tastants
depolarizes
