Exam #4: Oral Cavity

Question 1

Masticatory Mucosa

Answer 1

Keratinized & parakeratninized stratified squamous epithelium

Question 2

What is the difference between the masticatory mucosa of the hard & soft palate?

Answer 2

Soft palate has a Submucosa

Question 3

Lining Mucosa

Answer 3

Nonkeratinized stratified squamous epithelium

Question 4

Burton’s Line

Answer 4

Blue/Gray gingival margin from lead poisoning

Question 5

Filiform

Answer 5

• Keratinized
• Most numerous
• No taste buds

Question 6

Fungiform

Answer 6

Mushroom shaped

Question 7

Circumvallate

Answer 7

• Just anterior to the sulcus terminalis
• Largest
• Taste buds laterally
• Non-keratinized

Question 8

Foliate

Answer 8

• Lateral border of the tongue

- Poorly developed

Question 9

Skin vs. Muscosa of Lip

Answer 9

Skin= stratified squamous keratinized epithelium 
Mucosa= nonkeratinized

Question 10

Most common cancer of the lips?

Answer 10

Squamous cell carcinoma

- Mostly on the lower lip (sun exposure)

Question 11

Parotid Gland

Answer 11

Purely serous

Question 12

Submandibular Gland

Answer 12

Mixed, mostly serous

Question 13

Sublingual Gland

Answer 13

Mixed, mostly mucous

Question 14

Acquired pellicle

Answer 14

Protein component of saliva

Question 15

Crown of the Tooth

Answer 15

Enamel & Dentin

Question 16

Root of the Tooth

Answer 16

Cementum & Dentin

Question 17

Bud Stage

Answer 17

Invagination

Question 18

Cap Stage

Answer 18

• Differentiation of the epithelium at the base of the invagination of the bud stage
• Becomes ameloblasts (enamel)

Question 19

Bell Stage

Answer 19

Dental papilla w/ four distinct regions

Question 20

Appositional Stage

Answer 20

Tooth eruption begins

Question 21

Ameloblast vs. Odontoblast

Answer 21

Ameloblast= enamel, 2nd, ectoderm
Odontoblast= dentin, 1st, neural crest cells

Question 22

Cementum

Answer 22

• Covers dentin in the root of the tooth

- Produced by cementoblasts