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Block 5 module 3 COPY > gustatory > Flashcards

Flashcards in gustatory Deck (44):
1

3 epithelial cells present

1. supportive/ sustentacular cells
2. gustatory receptor cells
3. Basal cells

2

tips of gustatory receptor cells are covered with

microvilli

3

The microvilli contain ____ and are devoid of

sites that bind tatants; axons

4

stem cells found at the
periphery of the taste bud near the
connective tissue layer.

basal cells

5

basal cells produce ______ which then develop into _____

supporting cells; gustatory receptor cells

6

any stimulus that can be tasted

tastant

7

tastants can be pereived by

small ion channels and g protein coupled receptors (GPCRs)

8

small ion channels perceive

salty and sour tastes

9

GPCRs perceive

sweet or bitter tastes

10

bitter tastes signals

poisons

11

sour taste detects

harmful acids

12

sweetness and saltiness proves intake of survival

necessary Na and sugar

13

intensity of osur taste is proportional to the

log of H ion conc

14

sour tastes is caused by

acids

15

mainly responsible for salty taste

cations of salts esp Na cations

16

most of the substances that cause sweet taste are

organic chemicals

17

2 classes of substances to cause bitter taste sensations

1. long chain organic substances that contain Nitrogen
2. alkaloids

18

umami is the dominant taste of food containing

L-glutamate

19

circular structures mound like structures surrounded by a trench

circumvallate

20

the circumvallate form _________ on the posterior portion of the tongue

inverted V

21

mushroom shaped found on the flat anterior surface of the tongue

fungiform papillae

22

locations where the primary taste sensations are perceived

1. circumvallate
2. fungiform papillae M
3. foliate papillae M
4. tonsillar pillars (few)
5. epiglottis and proximal esophagous

23

pointed,
threadlike, small structures and provide
most of the bumpy appearance of the tongue

filiform papillae

24

CN- anterior 2/3 of tongue

CN VII Facial nerve

25

Facial nerve exits the brainstem in the

cerebellopontine angle

26

Facial nerve exits facial canal and skull via

stylomastoid foramen

27

posterior 1/3 of tongue

CN IX glossopharyngeal

28

CN IX mediates

taste, salivation and swallowing

29

CN IX exits the skull via the

jugular foramen

30

CN IX exits the skull via the jugular foramen togeter with

X and XI

31

location of vagus nerve

epiglottis

32

CN X mediates

phonation , swallowing, elevation of the palate and taste

33

CN X exits the brainstem (medulla) from the

postolivary sulcus

34

primarily responsible for taste perception

gustatory cortex

35

the gustatory cortex is located at the

rostral and lateral regions of the nucleus tractus solitarii

36

gustatory cortex consists of

1.anterior insula on the insular lobe
2. frontal operculum

37

Taste impulses from the anterior two thirds of the
tongue pass first into the _______ then
through the ______ into the ________,
and finally into the _________ in the brain
stem.

lingual nerve
chorda tympani
facial nerve
tractus solitarius

38

Taste sensations from the circumvallate papillae on
the back of the tongue and from other posterior
regions of the mouth and throat are transmitted
through the ________ into the
__________,

glossopharyngeal nerve
tractus solitarius

39

Taste perception is ________
and is controlled by
chemosensory neurons in the GC.

concentration dependent

40

Constant weak application of one stimulus
_______perception

strengthens

41

The taste of one food affects the taste of
another. this is an example of

cross adaptation

42

Sensation of odour perceived when
chewing and swallowing, as the odorant in
the mouth is forced upwards behind the
palate into the nose

retronasal olfaction

43

Combination of true taste (from the taste
buds) and retronasal olfaction

flavour

44

flavour is a combination of ________ and _______

true taste and retronasal olfaction