6.4 Chemical Sense Taste And Smell Flashcards Preview

Physiology > 6.4 Chemical Sense Taste And Smell > Flashcards

Flashcards in 6.4 Chemical Sense Taste And Smell Deck (35):
0

Lifespan of taste cells

10 days

1

Type 1 taste cells
A. Dark
B. Light
C. Intermediate

Type 1- dark
Type 2- light
Type 3- intermediate

2

Needed to stimulate the tastes buds

Saliva

3

Which papillae is not involved in gustation

Filiform papillae

4

Fungiform papillae is innervated by

CN VII

5

This papillae is innervated by CN VII and IX

Foliate

6

Papillae Associated with Von ebner's gland

Circumvallate

7

Umami sensation is caused by

L-glutamate

8

5 primary taste quality

Salty
Sweet
Sour
Bitter
Umami

9

Taste buds are composed of modified epithelial cells specifically your ______ cells and ______ cells

Sustentacular/ supporting cells and taste cells

10

Two taste receptors that activate ion channels

Salty Na receptors
Sour H receptors

11

Activates 2nd messengers

Sweet
Bitter

12

Receptor potential for taste

Change in electrical potential

13

T or f
Bitterness is much more sensitive since it is important for survival as it confers protection from toxins

True

14

Type 1: salty taste via ENAC; type 2 : ______ via _____

Type 2: sweet umami bitter taste via GPCR

15

Transmitter of sour or type III cells

5-HT (Serotonin)

16

Stimulates bitter 1 receptor by closing of K channels

Quinine

17

Innervation of posterior 1/3 of tongue

Glossopharyngeal n

18

Innervation of base of tongue

Vagus nerve

19

Nerves transmit signals to which part of the brain stem

Nucleus tractus solitarius

20

Nerve that DOES NOT transmit taste sensation

Lingual n.

21

Absence of tastes due to damaged Glossopharyngeal or lingual n

Ageusia

22

Diminished taste

Hypoguesia

23

Unpleasant perception of taste

Paraguesia or dysguesia

24

Olfactory receptors are what kind of receptors

Chemoreceptors

25

T or f
Olfactory cells are true neurons which regenerate throughout life

True

26

Olfactory membrane contains

Olfactory cells and bowman's glands interspersed among sustentacular cells
Also contains trigeminal pain fibers

27

Qualities of an odorant

Volatile
Slightly water and lipid soluble

28

T or f
Feedback stimulation stimulates the inhibition to suppress relay of signals through the olfactory bulb

False - feedback inhibition

29

Medial olfactory tract: old; lateral : 1. _____ and 2. _____

Lateral olfactory tract: less old and newer system

30

The area concerned with the basic behavior to olfaction

Medial olfactory area

31

Concerned with the association of some smells to certain memories; like and dislike

Lateral olfactory area specifically the less old OS

32

In the lateral olfactory the signals go to which parts of the brain

Limbic system and hippocampus(memory)

Medial: limbic system and hypothalamus

33

Concerned with the conscious analysis of odor

Lateral olfactory area specifically Newer pathway OS

34

Newer pathway sends fibers that feed DIRECTLY into the paleocortex WITHOUT passing through the Thalamus
T or f

False.
LESS OLD pathway sends fibers that feed DIRECTLY into the paleocortex WITHOUT passing through the Thalamus

*NEWER pathway passed through the thalamus to the orbital frontal cortex