taste and olfaction histo

Question 1

how do sinuses communicate with nasal cavities

Answer 1

narrow openings into respiratory mucosa

Question 2

what is the hallmark of olfactory mucosa

Answer 2

• very thick

- lacks goblet cells

Question 3

what kind of epithelium is olfactory muscoa

Answer 3

pseudostratified ciliated columnar epithelium

Question 4

what kind of epithelium is the oral mucosa

Answer 4

stratified squamous w/ varying levels of keratinization

Question 5

what are the three divisions of oral mucosa

Answer 5

lining
masticatory
specialized

Question 6

where is masticatory mucosa found

Answer 6

• hard palate
• gingiva
• dorsal tongue

Question 7

what are the characteristics of masticatory mucosa

Answer 7

• keratinized/parakeratinized
• condensed nuclei
• interdigitated w/ rete ridges and papillae
• thin/absent submucosa

Question 8

what are the characteristics of lining mucosa

Answer 8

• distinct submucosa
• mostly nonkeratinized
• has stratum basale/spinosum/superficiale

Question 9

where is lining mucosa found

Answer 9

lips
cheeks
floor of mouth
inferior tongue
soft palate

Question 10

where is specialized mucosa found

Answer 10

only on the dorsal tongue

Question 11

what are the characteristics of specialized mucosa

Answer 11

• papillae and taste buds

- keratinized epithelium

Question 12

what kind of papilla of the tongue does NOT provide taste sensation

Answer 12

filiform

Question 13

what do filiform papillae do

Answer 13

move food toward the pharynx

Question 14

where are foliate papillae

Answer 14

lateral and posterior surface of the tongue

Question 15

where are fungiform papillae

Answer 15

small in number on the dorsal surface of the tongue

Question 16

where are cirvumvallate papillae

Answer 16

anterior to sulcus terminalis

Question 17

how do taste buds appear when stained

Answer 17

oval, pale extending entire thickness of epithelium

Question 18

what three cell types make up the taste buds

Answer 18

neuroepithelial cells
supporting cells
basal cells

Question 19

which cell of the taste bud synapses with afferents sensory neurons

Answer 19

neuroepithelial cells

Question 20

what is dentin

Answer 20

a calcified organic matrix similar to bone that constitutes the root and crown of teeth

Question 21

what is cementum

Answer 21

amorphous calcified tissue investing the root of the tooth

Question 22

what is the function of pulp within teeth

Answer 22

nutrition to dentin

Question 23

what is predentin

Answer 23

a collagen rich matrix secreted by odontoblasts, mineralizes into dentin after 1 day

Question 24

what are ameloblasts

Answer 24

tall polarized cells in contact w/ dentin

secretes enamel matrix from Tome’s process

Question 25

where does the periodontal ligament insert

Answer 25

cementum and alveolar bone

Question 26

where is olfactory mucosa found

Answer 26

the superior-most portion of the nasal cavity, nearest the ethmoid bone