Oral Mucosa [Practice MC Questions]

Which are the three parts of the oral mucosa?

A) Stratified squamous epithelium, connective tissue, submucosa

B) Epithelium, basement membrane, enamel

C) Epithelium, lamina propria, alveolar bone

D) Epithelium, dentin, pulp

E) Keratinocytes, fibroblasts, melanocytes

A

The papillary lamina propria is composed of:

A) Dense collagen fibers only

B) Loose CT, vessels, fibroblasts, collagen, elastic fibers, nerves, Meissner's corpuscles

C) Elastic fibers and reticular fibers

D) Adipose tissue and glands

E) Hyaline cartilage

B

True/False: The reticular lamina propria is the more collagenous part of the oral mucosa.

True

Which structures are typically found in the submucosa?

A) Nerves, adipose, minor salivary glands, skeletal muscle

B) Fibroblasts, keratinocytes, melanocytes

C) Rete ridges, collagen IV, hemidesmosomes

D) Alveolar bone, cementum, dentin

E) Chondrocytes, lacunae, cartilage

A

Which two areas of the oral cavity lack submucosa?

A) Alveolar mucosa and gingiva

B) Hard palate and attached gingiva

C) Tongue and buccal mucosa

D) Soft palate and lips

E) Vestibule and gingiva

B

True/False: Attached gingiva is bound directly to bone via a mucoperiosteum, rather than through a submucosa.

True

At which week of development does epithelial stratification begin?

A) 26 days

B) 5-6 weeks

C) 7 weeks

D) 8-12 weeks

E) 13-20 weeks

B

Failure of palatal shelf fusion during weeks 8-12 results in:

A) Cleft palate

B) Microstomia

C) Leukoedema

D) Fordyce granules

E) Hairy tongue

A

Statement 1: Filiform papillae develop by weeks 10-12.

Statement 2: By weeks 13-20, oral epithelia thicken and parakeratinization occurs.

A) Both True

B) Both False

C) 1 True, 2 False

D) 1 False, 2 True

A

Which is not a function of the oral mucosa?

A) Protection

B) Sensation

C) Speech

D) Anchoring the periodontal ligament

E) Preparing food for digestion

D

Masticatory mucosa includes:

A) Buccal mucosa and lips

B) Hard palate, attached gingiva, anterior tongue

C) Ventral tongue, soft palate

D) Floor of the mouth and vestibule

E) Oropharynx

B

True/False: Specialized mucosa is found on the dorsal tongue and may be keratinized or non-keratinized.

True

Which mucosa is thick, non-keratinized, flexible, and found on most intraoral surfaces?

A) Lining mucosa

B) Masticatory mucosa

C) Specialized mucosa

D) Gingival mucosa

E) Periosteal mucosa

A

Which of the following factors does not influence oral mucosal color?

A) Epithelium thickness

B) Keratinization degree

C) Melanin pigmentation

D) Dilation of blood vessels

E) Amount of dentin

E

True/False: The vermilion border of the lips marks the junction between external skin and oral mucosa.

False

Which condition is associated with loss of vermilion border due to chronic sun exposure?

A) Leukoedema

B) Cheilitis

C) Precancerous lesion of external lip

D) Fordyce granules

E) Linea alba

C

The internal lip (labial mucosa) contains:

A) Hair follicles

B) Minor salivary glands

C) Skeletal muscle bundles only

D) Adipose tissue only

E) None of the above

B

The mucogingival junction separates:

A) Alveolar mucosa and attached gingiva

B) Gingiva and tongue

C) Vestibule and hard palate

D) Lip and alveolar bone

E) Buccal mucosa and retromolar trigone

A

Which gingival structure creates a potential pocket for plaque accumulation?

A) Attached gingiva

B) Free gingiva

C) Interdental gingiva

D) Alveolar mucosa

E) Gingival margin

B

True/False: The gingival sulcus is normally 0.5-3 mm deep.

True

The junctional epithelium is derived from:

A) Lamina propria

B) Reduced enamel epithelium

C) Neural crest

D) PDL fibers

E) Oral ectoderm

B

True/False: Junctional epithelium can regenerate due to constant remodeling.

True

Periodontitis is primarily associated with:

A) Free gingiva

B) Junctional epithelium

C) Alveolar mucosa

D) Hard palate

E) Tongue dorsum

B

Statement 1: Attached gingiva is mobile and red.

Statement 2: Alveolar mucosa is flexible, red, and contains submucosa.

A) Both True

B) Both False

C) 1 True, 2 False

D) 1 False, 2 True

D

Free gingiva is:

A) Keratinized facing oral cavity, non-keratinized facing tooth

B) Non-keratinized on both surfaces

C) Keratinized on both surfaces

D) Found only on posterior gingiva

E) Bound directly to alveolar bone

A

Which part of the oral cavity has mucoperiosteum instead of submucosa?

A) Soft palate

B) Hard palate

C) Buccal mucosa

D) Alveolar mucosa

E) Vestibule

B

Which structures form the posterior boundary of the oral cavity?

A) Median raphe

B) Palatoglossal folds

C) Palatal torus

D) Gingiva

E) Maxillary tuberosity

B

True/False: The uvula is a soft tissue projection from the middle of the soft palate.

True

Which region marks the beginning of the oropharynx?

A) Palatoglossal folds

B) Palatopharyngeal folds

C) Tonsillar pillars

D) Gingiva

E) Soft palate

B

Which tonsils are located in the tonsillar fauces between the palatoglossal and palatopharyngeal folds?

A) Lingual tonsils

B) Palatine tonsils

C) Pharyngeal tonsils

D) Tubal tonsils

E) None of the above

B

True/False: The oropharyngeal wall contains lymphoid tissues.

True

Which zone of the palate contains minor salivary glands?

A) Palatal rugae

B) Fatty zone

C) Glandular zone

D) Median raphe

E) Gingival margin

C

Which is a bony protrusion of the hard palate?

A) Palatal torus

B) Palatine tonsil

C) Maxillary tuberosity

D) Retromolar pad

E) Uvula

A

The incisive papilla is located:

A) Behind the central incisors

B) At the midline of the soft palate

C) At the junction of hard and soft palate

D) On the ventral tongue

E) Within the gingival sulcus

A

Which branchial arches form the posterior third of the tongue?

A) 1st arch

B) 2nd arch

C) 3rd and 4th arches

D) 2nd and 3rd arches

E) 4th and 5th arches

C

Which papillae lack taste buds?

A) Filiform

B) Fungiform

C) Foliate

D) Circumvallate

E) All contain taste buds

A

True/False: Fungiform papillae are mushroom-shaped, located on anterior 2/3, and are non-keratinized.

True

Von Ebner's glands are associated with:

A) Filiform papillae

B) Circumvallate papillae

C) Fungiform papillae

D) Foliate papillae

E) Ventral tongue

B

Which condition results from elongated filiform papillae due to poor oral hygiene or antibiotics?

A) Geographic tongue

B) Hairy tongue

C) Fordyce granules

D) Linea alba

E) Leukoplakia

B

The lingual frenulum connects:

A) Hard palate to soft palate

B) Tongue to floor of mouth

C) Lip to alveolar ridge

D) Uvula to soft palate

E) Cheek to maxilla

B

True/False: Ankyloglossia ("tongue-tie") is caused by a short, thick lingual frenulum.

True

Which ducts open at the sublingual caruncle?

A) Stensen's duct

B) Wharton's and Bartholin's ducts

C) Von Ebner's ducts

D) Sublingual folds

E) Minor buccal salivary ducts

B

Which papillae are leaf-like and located on the lateral posterior tongue?

A) Filiform

B) Fungiform

C) Foliate

D) Circumvallate

E) None

C

Statement 1: Circumvallate papillae are keratinized and located before the terminal sulcus.

Statement 2: They are associated with Von Ebner's serous glands.

A) Both True

B) Both False

C) 1 True, 2 False

D) 1 False, 2 True

A

Which papillae are most numerous on the tongue?

A) Filiform

B) Fungiform

C) Circumvallate

D) Foliate

E) Vallate

A

Which is a white line on the buccal mucosa at the occlusal plane due to friction?

A) Fordyce granules

B) Linea alba

C) Leukoedema

D) Leukoplakia

E) Erythroplakia

B

True/False: Leukoedema appears as a gray mucosal discoloration that disappears when stretched.

True

Fordyce granules are ectopic sebaceous glands in the lamina propria. They are normal in adults but concerning in children because of association with:

A) Oral thrush

B) Oral cancer

C) Colon cancer

D) Leukoplakia

E) Leukemia

C

Which variation is marked by erythematous areas with white borders due to atrophy of filiform papillae?

A) Geographic tongue

B) Hairy tongue

C) Leukoedema

D) Fordyce granules

E) Leukoplakia

A

Which lesion is red, not due to inflammation, and often premalignant?

A) Leukoplakia

B) Leukoedema

C) Erythroplakia

D) Fordyce granules

E) Linea alba

C

The oral mucosa provides all of the following functions except:

A) Protection from trauma and microbes

B) Sensation of touch, pain, and taste

C) Secretion of saliva through major and minor glands

D) Thermoregulation via sweat glands

E) Mastication and speech facilitation

D

True/False: The oral mucosa acts as a barrier to toxins and carcinogens.

True

Statement 1: Oral mucosa provides cushioning during mastication.

Statement 2: It contributes to swallowing and speech.

A) Both True

B) Both False

C) 1 True, 2 False

D) 1 False, 2 True

A

Which component of the oral mucosa contains nerves, vessels, and connective tissue?

A) Epithelium

B) Lamina propria

C) Submucosa

D) Periosteum

E) Enamel

B

What type of epithelium lines most of the oral cavity?

A) Simple squamous

B) Stratified squamous

C) Transitional

D) Pseudostratified columnar

E) Cuboidal

B

Which epithelium is keratinized?

A) Hard palate

B) Attached gingiva

C) Dorsal tongue

D) All of the above

E) None of the above

D

True/False: Non-keratinized oral mucosa is more flexible than keratinized mucosa.

True

Which of the following is NOT true about keratinization in oral mucosa?

A) Keratinized epithelium provides greater protection

B) Keratinization involves the presence of stratum granulosum

C) Parakeratin retains nuclei in superficial cells

D) Orthokeratin lacks nuclei in superficial cells

E) Keratinization is equally distributed across all intraoral surfaces

E

Which layer of the oral epithelium is the site of active cell division?

A) Stratum basale

B) Stratum spinosum

C) Stratum granulosum

D) Stratum superficiale

E) Lamina propria

A

At what week of embryonic development does the tongue epithelium specialize?

A) 26 days

B) 5-6 weeks

C) 7 weeks

D) 8-12 weeks

E) 13-20 weeks

C

Which mucosal type is found on the buccal mucosa, soft palate, ventral tongue, and floor of mouth?

A) Masticatory mucosa

B) Lining mucosa

C) Specialized mucosa

D) Cutaneous mucosa

E) None of the above

B

Statement 1: Masticatory mucosa is designed to withstand friction during chewing.

Statement 2: It is typically non-keratinized.

A) Both True

B) Both False

C) 1 True, 2 False

D) 1 False, 2 True

C

Which mucosa contains taste buds?

A) Lining mucosa

B) Masticatory mucosa

C) Specialized mucosa

D) Gingival mucosa

E) None of the above

C

True/False: The color of attached gingiva is paler than alveolar mucosa because it is more keratinized and tightly bound to bone.

True

True/False: Fordyce granules are considered a normal anatomical variation of oral mucosa in adults.

True

Stensen's duct is the opening of which major salivary gland?

A) Sublingual gland

B) Submandibular gland

C) Parotid gland

D) Minor buccal glands

E) Von Ebner's glands

C

Where does Stensen's duct open intraorally?

A) Sublingual caruncle

B) Floor of the mouth

C) On the buccal mucosa

D) Retromolar trigone

E) Behind the incisive papilla

C

True/False: The frenulum is a maxillary attachment connecting the buccal and labial mucosa to alveolar mucosa

False

Statement 1: A frenum is a small fold of mucous membrane that limits the movement of an organ.

Statement 2: The labial frenum attaches the inside of the lip to the alveolar mucosa.

A) Both True

B) Both False

C) 1 True, 2 False

D) 1 False, 2 True

A

The retromolar trigone is located:

A) Anterior to the incisive papilla

B) Behind the maxillary tuberosity

C) Behind the mandibular second molar

D) Between the palatoglossal and palatopharyngeal folds

E) At the midline of the palate

C

The median raphe of the palate:

A) Contains minor salivary glands

B) Marks the fusion line of the palatal shelves

C) Contains fat and muscle

D) Lies at the retromolar pad

E) Is located on the ventral tongue

B

True/False: The sublingual sulcus marks the junction between the alveolar ridge and the ventral surface of the tongue.

True

Waldeyer's ring is composed of all the following lymphoid tissues except:

A) Palatine tonsils

B) Pharyngeal tonsil

C) Lingual tonsils

D) Tubal tonsils

E) Submandibular gland

E

Statement 1: Waldeyer's ring surrounds the naso- and oropharynx with lymphoid tissue.

Statement 2: It forms part of the body's first line of defense against inhaled or ingested pathogens.

A) Both True

B) Both False

C) 1 True, 2 False

D) 1 False, 2 True

A