510-7

Question 0

foramen cecum

Answer 0

pit in the back of the tongue that is the remnant of the thyroid gland invagination

Question 1

sulcus terminalis

Answer 1

v shaped depression that separates the body and root of the tongue

Question 2

body of the tongue

Answer 2

anterior 2/3 of the tongue that developed from the 1st arch

Question 3

root of the tongue

Answer 3

posterior 1/3 of the tongue that developed from the 3rd arch

Question 4

2 types of tongue muscles

Answer 4

1. ) external- one attachment outside of the tongue

2. ) internal- longitudinal, transverse, vertical

Question 5

nerve that controls the motor control of the tongue

Answer 5

7 hypoglossal

Question 6

4 types of tongue papilla

Answer 6

1. ) circumvallate
2. ) foliate
3. ) filiform
4. ) fungiform

Question 7

geographic tongue

Answer 7

regional loss of papillae

Question 8

filiform papillae

Answer 8

keratinized, no taste buds, point backwards

Question 9

hairy tongue

Answer 9

overgrown papillae due to the accumulation of keratinized tissue

Question 10

von ebner’s gland

Answer 10

serous glands in the tongue found at the base of foliate and vallate papillae

Question 11

circumvallate papilla

Answer 11

parakeratinized, have taste buds in the sides, von ebners glands in the base of clefts

Question 12

foliate papillae

Answer 12

vertical folds in the side of the tongue, non keratinized, von ebners glands in the base of the cleft, taste buds on the sides

Question 13

fungiform

Answer 13

taste buds at the top, keratinized thin epithelia, extensive connective tissue (appear red)

Question 14

taste bud

Answer 14

columnar support and sensory cells that are replaced by stem cell basal cells. each sensory cell is innervated. microvilli at the tips of columnar cells. span the entire epithelium. pale staining.

Question 15

tongue innervation

Answer 15

#5: basic sensory info
#7: taste buds in body of tongue
#9 and #10: control root of tongue

Question 16

Taste Cell

Answer 16

taste molecule binds to receptor in microvilli of taste cell which depolarizes the cell and leads to the release of vesicles onto neurons