travers 3 (sensation)

Question 1

What arch is the mucosa of the body of the tongue from

Answer 1

arch 1

Question 2

What arch is the mucosa of the root of the tongue from

Answer 2

arch 3

Question 3

What cranial nerves innervate taste buds

Answer 3

VII, IX, X

Question 4

What cranial nerve supplies somatosensory innervation to the anterior mouth

Answer 4

V

Question 5

What cranial nerve supplies somatosensory innervation to the posterior tongue and pharynx

Answer 5

IX

Question 6

What fibers detect touch

Answer 6

A beta and A delta

Question 7

What fibers detect warming

Answer 7

c fibers

Question 8

what fibers detect cooling

Answer 8

A delta

Question 9

What fibers detect pain

Answer 9

a delta and c fibers

Question 10

Large fibers detect:

Answer 10

touch

A beta

Question 11

Small fibers detect:

Answer 11

thermal and pain

A delta, C

Question 12

What mechano receptors are found in the mucous membrane

Answer 12

merkel

meissner

Question 13

Meissner’s corpuscle:

fiber type?
location?
encapsulated?

Answer 13

fiber type: large axons (A beta and larger A delta)

location: in superficial lamina propria between rete pegs
encapsulate: yes by shwann cells

Question 14

Merkel receptor:

fiber type?
location?
synapse?

Answer 14

fiber type: large axons (A beta and larger A delta)

location: apices of rete pegs

merkel cells synapse on merkel receptors

Question 15

Which receptors are rapidly adapting

Answer 15

Meissners

due to cushioning of encapsulation

Question 16

Which receptors are slowly adapting

Answer 16

Merkel

Question 17

Both Meisser & Merkel receptors have very low thresholds but differ in their response to the dynamic aspects of the stimulus.

T/F

Answer 17

T

Question 18

Both Meissner and Merkel receptors can code painful sensations. T/F

Answer 18

F, neither can encode pain

Question 19

What types of fibers encode pain

Answer 19

A delta, C

Question 20

What senses spiciness

Answer 20

Not taste system

pain receptors

TRPA1 (also in pulp–responds to inflammation)

Question 21

How many taste buds are there in an average mouth

Answer 21

8000

Question 22

What branchial arches are associated with fungiform papillae

Answer 22

location: dorsal anterior (arch 1)
sensation: chorda tympani VII (arch 3)

Question 23

Where are taste buds located on fungiform

Answer 23

dorsal surface (on top)

Question 24

What innervates filiform

Answer 24

only somatosensory

no taste buds!

Question 25

What CN is associated with foliate papilla

Answer 25

IX

Question 26

What papilla are closely associated with von ebner glands

Answer 26

foliate, circumvallate

Question 27

Which papilla has the most taste buds

Answer 27

circumvallate

Question 28

What CN is associated with circumvallate

Answer 28

IX

Question 29

What is the main function of taste buds on the larynx

Answer 29

respond to deviations from isotonicity signal to protect the airway

Question 30

A taste map of the tongue is accurate. T/F

Answer 30

F

Question 31

A single fungiform papillae can usually detect more than one quality. T/F

Answer 31

T

Question 32

If you lose one of your chorda tympani nerves your ability to taste will be reduced by half. T/F

Answer 32

F taste is very redundant -- you probably wouldn't notice a difference if the flavor was applied to your entire tongue

Question 33

The number of taste papilla varies greatly among individuals, but their taste ability remains fairly constant. T/F

Answer 33

T

Question 34

What family of receptors can detect bitter taste

Answer 34

tas2r

Question 35

What key molecule in vegetables causes people with sensitive tas2r receptors to detect more bitter taste

Answer 35

glucosinolates

Question 36

People with sensitive tas2r receptors eat less cruciferous vegetables. t/f

Answer 36

t

Question 37

How does people's perception of sweetness change

Answer 37

only one type of receptor, but promoter region determines how many receptors you will have

Question 38

Dark type I taste bud cells role?

Answer 38

stain for glial markers indicates supportive role

Question 39

Light taste bud cells have microvilli that reach the taste pore and express receptors for taste substances. t/f

Answer 39

t

Question 40

What do type III light cells detect? Do they synapse with the primary afferent nerve?

Answer 40

sour yes they synapse w nerve

Question 41

What do type II light cells detect? Do they synapse with the primary afferent nerve?

Answer 41

bitter, sweet, amino acids do not synpase

Question 42

How do type II cells communicate with brain?

Answer 42

use ATP as a transmitter you don't need a typical synapse for this

Question 43

Taste buds are modified epithelial cells. However, they are not replaced throughout life. t/f

Answer 43

first sentence true | last sentence false

Question 44

What role does SHH play in taste bud development?

Answer 44

released from precursor cells, acts on surrounding cells to maintain taste buds

Question 45

What happens if you introduce a SHH antagonist?

Answer 45

your taste buds get fucked up and you can't taste shit

Question 46

Final differentiation of the taste bud requires neural innervation. t/f

Answer 46

t without nerve, taste bud will not develop if your primary afferent nerve is damaged, taste buds will die

Question 47

What molecules are important for taste bud development and tooth development?

Answer 47

wnt bmp SHH FGF

Question 48

When does the tongue appear

Answer 48

4th week IU

Question 49

When do the taste buds first appear

Answer 49

8th week IU

Question 50

When do the taste pores first appear

Answer 50

12th week IU