Gustatory and Olfactory System Histology Flashcards Preview

Nero Exam #2 > Gustatory and Olfactory System Histology > Flashcards

Flashcards in Gustatory and Olfactory System Histology Deck (23):
1

filiform papillae

medial tongue
NO TASTE buds
job is to grab onto food

2

fungiform papillae

lateral tongue
5 TASTE buds
register the taste of food

3

circumvallate papillae

posterior tongue
TASTE buds
taste sensation

4

foliate papillae

lateral wall of tongue
TASTE buds
taste sensation

5

serous glands (Ebner's glands)

found any place there are taste buds
secrete lingual lipase and VEGP
lingual lipase - breaks down food
VEGP - carries food to taste R

6

three cell components

taste R
supporting cells - become mature taste R cells
precursor cells - give rise to supporting cells

7

ovid chemoreceptors

found in papillae and on the soft palate posterior pharynx and epiglottis
inn by VAGUS n
allow to tell if the food is good or bad

8

taste R

tastant binds to R
G complex activated
ion channels opens leading to depolarization
Ca influx will lead to the release of NT

9

sweet

tip of tongue

10

salty

posterior and lateral tip of the tongue
senses Na ion

11

sour

anterior 2/3 of dorsum and along the lateral wall
senses H ion

12

bitter

posterior tongue

13

umami

unknown R distribution
activated by L-glutamate
signals the presence of proteins
added to processed food, stimulates appetite

14

facial n

all 5 taste sensations

15

glossopharyngeal n

sweet and bitter sensations

16

anterior 2/3 of tongue

sensory - lingual n (branch of CN V)
SVA - facial n

17

posterior 1/3 of tongue

sensory - glossopharyngeal n
SVA - glossopharyngeal and vagus n

18

nasal cavity

respiratory epithelium (pseudostratified columnar epithelium w/ goblet cells)
lamina propria
mast and plasma cells
extensive vascular plexus

19

functions of nasal cavity

air hydration
moisten the surface
add water vapor
air filtration
adheres particles allowing the cillia to move them to the GI tract
temperature regulation

20

olfactory cells

bipolar sensory neurons that run from epithelium to forming the olfactory n

21

supporting cells (sustentacular cells)

physical support to olfactory cell

22

basal cells

mitotically active stem cels

23

kallman syndrome

anosmia - lack of neurons in brain that get input from olfactory neurons
lack of GnRH because these cells start in the olfactory epithelium and migrate to the brain
defective KAL - 1