Taste smell Flashcards
Taste receptor cells are also located on the palate and epiglottis.
located in the epithelium not in pappilase
Taste receptor are clustered in taste buds,
which are mainly assoicated with fungiform and circumvallate/vallate papillae
tf Foliate papillae have tons of taste buds in adults.
Foliate papillae have few taste buds in adults.
epiglottis
SA from CN 10
posterior 1/3 tongue (including vallate papillae)
SA from CN-IX:
anterior 2/3 tongue, palate
SA from CN-VII:
anterior 2/3 tongue, hard and soft palate
GSA from CN 5
epiglottis
GVA from CN 10
tf GVA from CN-IX: ant 1/3 tongue, palatine tonsils,larynx
GVA from CN-IX: posterior 1/3 tongue, palatine tonsils, pharynx
Taste receptor cells are replaced
every 7-10 days
the taste receptor cells release neurotransmitter on afferents
of CN VII, CN IX and CN X
at apical end of taste receptor cell and
extend thru taste pore
microvilli
Taste molecule activates the taste receptor cell.
Increase intracellular Ca+2 through voltage gated Ca+2 channels and via release from internal stores.
Depolarizing receptor potential (inside of the taste receptor cell become more positive through several different mechanisms)
Transduction of the signal to the CNS (nucleus solitarius/solitaty nucleus)
Release of transmitter on to peripheral nerve (primary afferent)
Taste molecule activates the taste receptor cell.
- Depolarizing receptor potential (inside of the taste receptor cell become more positive through several different mechanisms)
- Increase intracellular Ca+2 through voltage gated Ca+2 channels and via release from internal stores.
- Release of transmitter on to peripheral nerve (primary afferent)
- Transduction of the signal to the CNS (nucleus solitarius/solitaty nucleus)
tf
when the Taste molecule activates the taste receptor cell. it hyperpolarizes polarizes receptor potential (inside of the taste receptor cell become more negative through several different mechanisms)
Taste molecule activates the taste receptor cell. 2. Depolarizing receptor potential (inside of the taste receptor cell become more positive through several different mechanisms)
voltage gated Ca+2 channels and via release from internal stores
help depol taste receptor cell
by inc intracellular Ca+2
The superior aspect of the nucleus solitarius is also referred to
The superior aspect of the nucleus solitarius is also referred to as the gustatory nucleus
Transduction of the signal to the CNS
from taster receptor cell
insula and the medial surface of the frontal operculum
gustatory cortex
The taste (SA) pathway follows
ips. course
Central tegmental tract
carries second order neurons of The taste (SA) pathway (ipsilateral)
near the base of the central sulcus.
gust cortex
Opercula (singular, operculum):
the regions of frontal, parietal and temporal lobes located adjacent to the lateral sulcus and overlying the insula
Taste information is also relayed from the solitary nucleus to retic. formation to regulate
salivation and swallowing
CN 1 SA
smell
CN 1
The only sensory system with no —– relay to the thalamus, though olfactory information will eventually be —–through the thalamus.
The only sensory system with no precortical relay to the thalamus, though olfactory information will eventually be processed through the thalamus.
The olfactory epithelium is a —– columnar
The olfactory epithelium is a pseudostratified columnar
what type of glands are in CN 1 olf ep.
Mucous producing glands are also present (Bowman’s glands)
tf taste receptor cells are neurons
F
olf receptor cells are neurons tho
