TASTE

Question 1

Taste aka——

Answer 1

gustation

Question 2

Disorders associated with the sense of taste are life-threatening.
T/F

Answer 2

F

Question 3

Because of their large size, approximately—- the total number of taste buds are found in ——- papillae.

Answer 3

half

circumvallate

Question 4

circumvallate papillae are innervated by —— and—.

Answer 4

circumvallate papillae are innervated by CNs VII and IX.

IX

Question 5

fungiform papillae has——- number of taste buds

Answer 5

3-5

Question 6

taste cells in fungiform papillae are innervated exclusively by the———

Answer 6

chorda tympani branch of CN VII. 5

Question 7

ageusia——
hypogeusia——-
hypergeusia———
dysgeusia————, including——

Answer 7

absence of taste

decreased taste sensitivity

increased taste sensitivity

distortion of taste

taste sensation in the absence of taste stimuli

Question 8

List the taste stimuli and their locations

Answer 8

Sweet- tip
Salty-anterior surface
Sour-sides
Bitter-root
Umami-tip

Question 9

MECHANISM OF TASTE TRANSDUCTION of sweet and umami taste buds

Answer 9

Binds to G protein–coupled membrane receptor

• increased IP3, Ca2+
• Opens TRP channels
• depolarization

Question 10

MECHANISM OF TASTE TRANSDUCTION of salty taste buds

Answer 10

Na+ ions Enters through membrane Na+ channels (ENaC)

-depolarization

Question 11

MECHANISM OF TASTE TRANSDUCTION of bitter taste buds

Answer 11

• Binds to G protein–coupled membrane receptor
• increased IP3, Ca2+
• Opens TRP channels
• depolarization

Question 12

Full meaning of TRP channels

Answer 12

transient receptor potential

Question 13

MECHANISM OF TASTE TRANSDUCTION of sour taste buds

Answer 13

• H+ ions Enters through membrane Na+ channels (ENaC)

- depolarization

Question 14

all five taste qualities can be detected over the full surface of the tongue.
T/F

Answer 14

T

Question 15

different regions of the tongue do not have different thresholds to some taste stimuli .
T/F

Answer 15

F

Question 16

The tip of the tongue is most responsive to__,——, and——

Answer 16

sweet

salty

umami

Question 17

Bitter taste buds can be stimulated by——- e.g.——-

Answer 17

Alkaloids

quinine strychnine

Question 18

Umami Aka——

Answer 18

savoriness

Question 19

Umami is stimulated by e.g.——- (MSG) - spices

Answer 19

monosodium glutamate

Question 20

in the gustatory system the receptor cells are not neurons.
T/F

Answer 20

T

Question 21

three cranial nerves (CNs—-,—-, and—) enter the—, ascend in the — tract and terminate on—- order neurons in the —— located in the——. That project——- to the—— of the——.
-Thirdorder neurons leave the—- and terminate in the—— cortex (in the—- lobe)

Answer 21

VII IX X

brain stem

solitary

second ;solitary nucleus

medulla

ipsilaterally

ventral posteromedial nucleus; thalamus

thalamus; taste; parietal