MCQs in Oral Histology

Chapter 11: mucous membrane

 

 

1- Sulcular epithelium is formed of:

  1. Nonkeratinized stratified squamous epithelium.
  2. Parakeratinized stratified squamous epithelium.
  3. Orthokeratinized stratified squamous epithelium.
  4. Columnar epithelium.

 

 

 

 

 

 

 

 

The answer is: A

 

2- Which of the following is a wrong statement about the dentogingival junction?

  1. It has an epithelial and a connective tissue component.
  2. It shifts apically with age.
  3. Its coronal end corresponds to the bottom of the gingival sulcus.
  4. Its epithelial cells are keratinized stratified squamous.

 

 

 

 

 

 

 

 

The answer is: D

 

3- Keratinized epithelium differs from nonkeratinized epithelium in that:

  1. It contains granular cell layer.
  2. Contain a higher glycogen content. 
  3. It does not contain basal lamina. 
  4. No tonofilaments are found in it.

 

 

 

 

 

 

 

 

The answer is: A

 

4- The buccal mucosa:

  1. Has a keratinized epithelium.
  2. Is continuous with the gingival mucosa.
  3. It is firmly attached to the underlying tissues.
  4. Has numerous connective tissue papillae.

 

 

 

 

 

 

 

The answer is: C

 

5- Masticatory mucosa has:

  1. Elastic fibers in its lamina propria.
  2. Elastic fibers in its blood vessels wall.
  3. Stratum corneum.
  4. No connective tissue papillae.

 

 

 

 

 

 

 

 

The answer is: B

 

6- Which of the following is true of the sulcular epithelium?

  1. Consists of keratinized epithelium.
  2. Has submucosa.
  3. Is nonkeratinized. 
  4. Contain connective tissue papillae.

 

 

 

 

 

 

 

 

The answer is: C

 

7- Parakeratinized epithelium is found in:

  1. Gingiva
  2. Vestibular fornix.
  3. Floor of the mouth.
  4. Ventral surface of tongue.

 

 

 

 

 

 

 

The answer is: A

 

8- In which area the connective tissue papillae are long & numerous?

  1. Buccal mucosa.
  2. Gingiva
  3. Alveolar mucosa.
  4. Floor of the mouth.   

 

 

 

 

 

 

 

 

The answer is: B

 

9- The mucogingival junction is the junction of:

  1. Sulcular epithelium & free gingiva.
  2. Free gingiva and attached gingiva.
  3. Alveolar mucosa and attached gingiva.
  4. Palatine gingival & rougae zone.

 

 

 

 

 

 

 

The answer is: C

 

10- The mucosa of the dorsal surface of the tongue is:

  1. Spesialized mucosa.
  2. Masticatory mucosa.
  3. Linning mucosa.
  4. Smooth surface.

 

 

 

 

 

 

 

 

The answer is: A

 

11- Which of the following represents the correct innervation of fungiform papilla?

  1. Chorda tympani.
  2. Facial nerve.
  3. Trigeminal nerve.
  4. Glossopharyngeal nerve.

 

 

 

 

 

 

 

 

The answer is: A

 

12- Which of the following appears to play an important role in attachment of its cells:

  1. Keratohyaline granules.
  2. Desmosomes
  3. Glycogen contents.
  4. Lysosomes

 

 

 

 

 

 

 

 

The answer is: B

 

13- The structure of the oral mucosa is:

  1. Epithelium and basement membrane.
  2. Mucosa & submucosa.
  3. Epithelium, lamina propria and muscular layer.
  4. Epithelium, lamina propria and basement membrane.

 

 

 

 

 

 

 

 

The answer is: D

 

14- Healthy line is represented in:

  1. Mucogingival junction.
  2. Free gingival groove.
  3. Junction of the palatine gingiva and the lateral surface of the palate.
  4. Junction of the buccal and labial mucosa.

 

 

 

 

 

 

 

 

The answer is: A

 

15- Fungiform papillae:

  1. Are seen as white spots.
  2. Have a stratum corneum. 
  3. Carry taste buds.
  4. Have a lamina propria which is poorly vascularized.

 

 

 

 

 

 

 

 

The answer is: C

 

16- Which of the following is true regarding the dentogingival junction?

  1. It is derived entirely from ectomesenchyme.
  2. It moves apically with age.
  3. It moves occlusally with age.
  4. Contains clear submucosa.

 

 

 

 

 

 

 

 

The answer is: B

 

17- Which of the following regions has a non-keratinized epithelium and is loosely attached to the underlying structures:

  1. Buccal mucosa.
  2. Attached gingiva.
  3. Hard palate.
  4. Vestibular fornix.

 

 

 

 

 

 

 

 

 

The answer is: D

 

18- The floor of the mouth is lined by:

  1. Linning mucosa loosely attached .
  2. Linning mucosa firmly attached.
  3. Specialized mucosa.
  4. Masticatory mucosa.

 

 

 

 

 

 

 

 

The answer is: A

 

 

19- Keratohyaline granules in epithelial cells of keratinized mucosa are associated with:

  1. The tonofilaments.
  2. Prickle cell layer.
  3. Basal cell layer.
  4. Stratum granulosum.

 

 

 

 

 

 

 

 

The answer is: D

 

20- Which of the following contributes to the reddish coloration of the vermilion border:

  1. Thichness of oral epithelium.
  2. Existance of high number of langerhans cells.
  3. Vascularity of the lamina propria.
  4. Epithelial keratinization.

 

 

 

 

 

 

 

 

 

The answer is: C

 

21- Which of the following are not usually found in the keratinocytes of  the stratum spinosum of keratinized oral epithelium?

  1. Keratohyaline granules
  2. Tonofibrils
  3. Membrane coating granules.
  4. Ribosomes

 

 

 

 

 

 

 

 

The answer is: A

 

22- The sulcular epithelium: 

  1. Is keratinized.
  2. Has thick epithelial layer.
  3. Has long epithelial ridges.
  4. Is nonkeratinized.

 

 

 

 

 

 

 

 

The answer is: D

 

23- Taste buds are not found on:

  1. Filliform papillae.
  2. Fungiform papillae.
  3. Foliate papillae.
  4. Circumvallate papillae.

 

 

 

 

 

 

 

 

 

The answer is: A

 

24- Which of the following is not present in the stratum spinosum:

  1. Desmosomes.
  2. Tonofilaments.
  3. Keratohyaline granules.
  4. Odland's bodies.

 

 

 

 

 

 

 

 

The answer is: C

 

25- Which of the following mucosa has a non-keratinized epithelium :

  1. Free gingiva.
  2. Attached gingiva.
  3. Mucosa of the floor of the mouth.
  4. Palatal mucosa.

 

 

 

 

 

 

 

 

 

 

The answer is: C

 

26- Which of the following is a transiant cell in the oral epithelium:

  1. Melanocyte
  2. Lymphocyte
  3. Merkel cell
  4. Langerhans cell

 

 

 

 

 

 

 

 

 

The answer is: B

 

27- Which of the following serves as a source of the cells which form the attachment epithelium:

  1. Dental sac.
  2. Reduced enamel epithelium & gingiva.
  3. Enamel cuticle.
  4. Vestibular lamina.

 

 

 

 

 

 

 

The answer is: B

 

 

28- The mode of attachment of the junctional epithelium is:

  1. Basement membrane.
  2. Basal lamina & hemidesmosome.
  3. Enamel cuticle.
  4. Odland's bodies.

 

 

 

 

 

 

 

 

The answer is: B

 

29- Which of the following is true of the attachment epithelium:

  1. Its coronal end is found at the bottom of the gingival sulcus.
  2. Its apical migration is the major causative factor in active eruption.
  3. Is impermeable to dyes and fluids.
  4. Can migrate coronally.

 

 

 

 

 

 

 

 

The answer is: A

 

30- Which of the following cells synthesize protein which remains within the cell without secretion:

  1. Osteoblasts
  2. Plasma cell
  3. Fibroblast
  4. Keratinocyte

 

 

 

 

 

 

 

 

The answer is: D

 

31- Which of the following papillae of the tongue do not contain taste buds:

  1. Filiform
  2. Vallate
  3. Foliate
  4. Fungiform

 

 

 

 

 

 

 

 

The answer is: C

 

32- Which is not true about taste buds:

  1. The supporting cells of a taste bud carry taste hairs.
  2. 10 to 20 neuroepithelial cells are the receptors of taste stimuli in a taste bud.
  3. Taste buds extend from the basal lamina to the surface of epithelium.
  4. Nerve fibers end in contact with the sensory cells in the taste buds.

 

 

 

 

 

 

 

The answer is: A

 

33- 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:

  1. Folliate
  2. Filliform
  3. Fungiform
  4. Circumvallate

 

 

 

 

 

 

 

 

The answer is: D

 

34- Glands emptying the circumvalate trough are the:

  1. Mucous glands.
  2. Serous glands.
  3. Glands of Nuhn.
  4. Mucous and serous mixed glands.

 

 

 

 

 

 

 

 

The answer is: B

 

35- Tongue papillae responsible for bitter taste sensation:

  1. Filliform papillae.
  2. Fungiform papillae.
  3. Circumvallate papillae.
  4. Foliate papillae.

 

 

 

 

 

 

 

 

 

The answer is: C