Oral muscosa Flashcards
Keratinized epithelium differs from nonkeratinized epithelium in that:
a- It contains granular cell layer.
b- Contain a higher glycogen content.
c- It does not contain basal lamina.
d- No tonofilaments are found in it.
A
The buccal mucosa:
a- Has a keratinized epithelium.
b- Is continuous with the gingival mucosa.
c- It is firmly attached to the underlying tissues.
d- Has numerous connective tissue papillae.
C
Masticatory mucosa has:
a- Elastic fibers in its lamina propria.
b- Elastic fibers in its blood vessels wall.
c- Stratum corneum.
d- No connective tissue papillae.
B
Parakeratinized epithelium is found in:
a- Gingiva.
b- Vestibular fornix.
c- Floor of the mouth.
d- Ventral surface of tongue.
A
In which area the connective tissue papillae are long & numerous?
a- Buccal mucosa.
b- Gingiva.
c- Alveolar mucosa.
d- Floor of the mouth.
B
The mucogingival junction is the junction of:
a- Sulcular epithelium & free gingiva.
b- Free gingiva and attached gingiva.
c- Alveolar mucosa and attached gingiva.
d- Palatine gingival & rougae zone.
C
The mucosa of the dorsal surface of the tongue is:
a- Specialised mucosa.
b- Masticatory mucosa.
c- Linning mucosa.
d- Smooth surface.
A
Which of the following represents the correct innervation of fungiform
papilla?
a- Chorda tympani.
b- Facial nerve.
c- Trigeminal nerve.
d- Glossopharyngeal nerve.
A
Which of the following appears to play an important role in attachment of its
cells:
a- Keratohyaline granules.
b- Desmosomes.
c- Glycogen contents.
d- Lysosomes.
B
The structure of the oral mucosa is:
a- Epithelium and basement membrane.
b- Mucosa & submucosa.
c- Epithelium, lamina propria and muscular layer.
d- Epithelium, lamina propria and basement membrane.
D
Healthy line is represented in:
a- Mucogingival junction.
b- Free gingival groove.
c- Junction of the palatine gingiva and the lateral surface of the palate.
d- Junction of the buccal and labial mucosa.
A
Fungiform papillae:
a- Are seen as white spots.
b- Have a stratum corneum.
c- Carry taste buds.
d- Have a lamina propria which is poorly vascularized.
C
Which of the following is true regarding the dentogingival junction?
a- It is derived entirely from ectomesenchyme.
b- It moves apically with age.
c- It moves occlusally with age.
d- Contains clear submucosa.
B
Which of the following regions has a non-keratinized epithelium and is loosely attached to the underlying structures?
a- Buccal mucosa.
b- Attached gingiva.
c- Hard palate.
d- Vestibular fornix.
D
The floor of the mouth is lined by:
a- Lining mucosa loosely attached .
b- Lining mucosa firmly attached.
c- Specialized mucosa.
d- Masticatory mucosa.
A
Keratohyaline granules in epithelial cells of keratinized mucosa are associated
with:
a- The tonofilaments.
b- Prickle cell layer.
c- Basal cell layer.
d- Stratum granulosum.
D
Which of the following contributes to the reddish coloration of the vermilion
border?
a- Thichness of oral epithelium.
b- Existance of high number of langerhans cells.
c- Vascularity of the lamina propria.
d- Epithelial keratinization.
C
Which of the following are not
stratum spinosum of keratinized oral epithelium?
usually found in the keratinocytes of the
a- Keratohyaline granules
b- Tonofibrils.
c- Membrane coating granules.
d- Ribosomes.
A
The sulcular epithelium:
a- Is keratinized.
b- Has thick epithelial layer.
c- Has long epithelial ridges.
d- Is nonkeratinized.
D
Taste buds are not found on:
a- Filliform papillae.
b- Fungiform papillae.
c- Foliate papillae.
d- Circumvallate papillae.
A
Which of the following is not
a- Desmosomes.
present in the stratum spinosum?
b- Tonofilaments.
c- Keratohyaline granules.
d- Odland’s bodies.
C
Which of the following mucosa has a non-keratinized epithelium :
a- Free gingiva.
b- Attached gingiva.
c- Mucosa of the floor of the mouth.
d- Palatal mucosa.
C
Which of the following is a transiant cell in the oral epithelium:
a- Melanocyte.
b- Lymphocyte.
c- Merkel cell.
d- Langerhans cell.
B
Which of the following serves as a source of the cells which form the
attachment epithelium?
a- Dental sac.
b- Reduced enamel epithelium & gingiva.
c- Enamel cuticle.
d- Vestibular lamina.
B
The mode of attachment of the junctional epithelium is:
a- Basement membrane.
b- Basal lamina & hemidesmosome.
c- Enamel cuticle.
d- Odland’s bodies.
B
Which of the following is true of the attachment epithelium?
a- Its coronal end is found at the bottom of the gingival sulcus.
b- Its apical migration is the major causative factor in active eruption.
c- Is impermeable to dyes and fluids.
d- Can migrate coronally.
A
Which of the following cells synthesize protein which remains within the cell
without secretion:
a- Osteoblasts.
b- Plasma cell.
c- Fibroblast.
d- Keratinocyte.
D
Which is not
a- The supporting cells of a taste bud carry taste hairs.
true about taste buds:
b- 10 to 20 neuroepithelial cells are the receptors of taste stimuli in a taste bud.
c- Taste buds extend from the basal lamina to the surface of epithelium.
d- Nerve fibers end in contact with the sensory cells in the taste buds.
A
Those papillae of the tongue which are the largest, having many
taste buds and are associated with the duct of Von Ebner’s gland are:
a- Folliate.
b- Filliform.
c- Fungiform.
d- Circumvallate.
D
Glands emptying the circumvalate trough are the:
a- Mucous glands.
b- Serous glands.
c- Glands of Nuhn.
d- Mucous and serous mixed glands.
B
Tongue papillae responsible for bitter taste sensation:
a- Filliform papillae.
b- Fungiform papillae.
c- Circumvallate papillae.
d- Foliate papillae.
C
