oral histology MCQs – Page 8

Practise focused oral histology questions with marked answers for exam preparation and subject revision.

oral histology Mcqs
351. Movement of tooth to close the intermaxillary gap during eruption is due to____________?
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A. Passive eruption

B. None of the above

C. Physiological tooth migration

D. Active eruption
352. In resorption of roots of the primary teeth, the dental pulp_____________?
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A. Plays a passive role

B. Aids in formation of secondary dentin slowing down resorption

C. Becomes a fibrotic non-vital mass

D. Initiates resorption from the inner surface of roots

353. Tooth buds of permanent mandibular incisors are situated_____________?
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A. Labial to primary teeth

B. Inferior to primary teeth

C. A and B

D. Lingual to primary teeth

354. Masticatory mucosa is____________?
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A. Sub keratinised

B. Para keratinised

C. Non keratinised

D. Ortho keratinised
355. Merkel cells are found in which of the following tissue ______________?
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A. Reticular of dermis

B. Epidermis

C. Papillary layer of dermis

D. Hypodermis

356. Epithelial cells which ultimately keratinize are known as_____________?
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A. Non-Keratinizing cells

B. Keratinizing cells

C. Melanocytes

D. Clear cells

357. The maximum rate of eruption, as the tooth cusps reach the surface epithelium is around ________ ?m/day?
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A. 100

B. 75

C. 50

D. 25

358. The major cells seen in gingiva are______________?
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A. Odontoblasts

B. Merkel cells

C. Fibro blast

D. Cementoblasts

359. Minor salivary glands are present in the submucosa through out the oral mucosa except for the______________?
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A. Gingiva and anterior part of hard palate

B. Retromolar area and hard palate

C. Lip and posterior third of the hard palate

D. Tongue and soft palate

360. Tooth eruption is due to______________?
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A. Proliferation of cells at crypt

B. Osteoclastic activity

C. Eruptive force

D. Exforliation of primary tooth

361. The deciduous teeth can be differentiated from permanent teeth by_____________?
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A. Dentinal tubule arrangement

B. Enamel prismatic arrangement

C. Mineral content

D. Primary and secondary dentin

362. Keratohyaline granules are more evident in_______________?
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A. Keratinised

B. Orthokeratinized

C. Parakeratinised

D. Non keratinized

363. Protein making up the bulk of keratohyaline granules in stratum granulosum of keratinized epithelium is______________?
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A. Filaggrin

B. Nectin

C. Involucrin

D. Vinculin

364. The cells, which are responsible for removal of bone matrix in bone resorption, are_____________?
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A. Osteoblast

B. Osteoclasts

C. Fibrocytes

D. Polymorphs

365. Which of the following statement is false______________?
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A. Resorption of roots of deciduous incisors and canines begins on their lingual surfaces

B. Resorption of roots of deciduous molars begins on their inner surfaces

C. Shedding of deciduous teeth is delayed in the absence of their successor teeth

D. None of the above
366. The anatomic crown is shorter than the clinical crown of a tooth in which of the following instances___________________?
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A. Occlusal wear

B. Gingival recession

C. Impaction

D. Gingivitis

367. Gubernacular canal and gubernacular cord are seen in relation to____________?
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A. Succedaneous teeth

B. None of the above

C. Deciduous teeth

D. Permanent teeth

368. After the eruption of crown, reduced enamel is known as_____________?
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A. Reduced enamel epithelium

B. Primary attachment epithelium

C. Secondary attachment epithelium

D. Primary enamel cuticle

369. Teeth with out antagonist if erupt is called____________?
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A. Supra erupted

B. Over erupted

C. Submerged

D. Stable

370. Which of the following is correct_______________?
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A. Parakeratinished epithelium is characterized by superficial cells with pyknotic nuclei and absence of stratum granulosum

B. Non-keratinized epithelium is characterized by absence of stratum granulosum and stratum corneum, The surface cells are nucleated

C. In ortho keratinisation the superficial cells lose their nuclei, but stratum granulosum is present

D. All of the above
371. The connective tissue of the gingiva is known as the______________?
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A. Lamina propria

B. Dental cuticle

C. Fibroblasts

D. Lamina dura

372. Stratum Germinativum of the oral epithelium is the term given to_______________?
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A. Basal cells and parabasal spinous cells

B. Granular cell layer

C. Basal cell layer

D. Spinous cells and granular cells

373. In the tongue bitter taste is more perceived at_____________?
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A. Back

B. Sides

C. Tip

D. Front

374. Color of the normal gingiva is_____________?
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A. Red

B. None of the above

C. Coral pink

D. Pink

375. A suitable fixative for a routine biopsy specimen is_____________?
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A. 20% formalin

B. 40% formalin

C. 10% formalin

D. 10% alcohol

376. Masticatory mucosa in the oral cavity covers the_______________?
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A. Alveolar mucosa and vestibular fornix

B. Lip and cheek

C. Gingiva and hard palate

D. Floor of the mouth and soft palate

377. Dendritic cell located in the stratified squamous keratinizing epithelium of the oral cavity include_____________?
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A. Keratinocytes

B. Myoepithelila cells

C. Mast cells

D. Melanocytes
378. The most accepted theory of tooth eruption is____________?
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A. Hydrodynamic theory

B. Clone theory

C. Periodontal ligament traction theory

D. Vascular theory

379. Which enzyme is associated with the mineralization_____________?
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A. Acid phosphatase

B. Adenosine triphosphate

C. Alkaline phosphatase

D. Amino peptidase

380. Osteoblasts appear basic gram staining due to______________?
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A. Acidic ground substance

B. Presence of basic ground substance

C. Increased mitochondria

D. Increased ribonucleic acid
381. In mineralization which one of the following is known as Epitaxy ?
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A. Booster Mechanism

B. Cartier/s Adenosine Triphosphate theory

C. Alkaline Phosphatase theory

D. Seeding theory
382. Which of the following has immune function in the oral mucous membrane_______________?
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A. Merkel cells

B. Keratinocyte

C. Melanocyte

D. Langerhan cell
383. Epithelial attachment is_____________?
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A. Microscopically it resembles basal lamina

B. Attachment of ameloblasts to the tooth

C. Derived from secondary attachment epithelium

D. All of the above
384. Stratum granulosum is not present in_____________?
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A. Non keratinized epithelium

B. Hyper orthokeratosis

C. Hyper parakeratosis

D. Sulcular epithelium

385. Enamel tufts are_______________?
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A. Thin tuft like structure extending from enamel surface of dentin enamel junction

B. Tuft like structure arising from dentin-enamel junction towards enamel surface

C. None of the above

D. Odontoblastic processes extending into enamel

386. Stipplings______________?
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A. All of the above

B. Disappeared in progressing gingivitis due to edema and this change is reversible

C. Due to alternate elevations and depressions in epithelium

D. Functional adaptation to mechanical impact

387. The vermilion border requires frequent moistening because_____________?
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A. It contains more No. of sweat glands

B. It contains less number of sebaceous glands

C. It contains less number of sweat glands

D. It contains more do. of sebaceous glands

388. The function of merkel cells is_______________?
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A. Secretory function

B. Nutritive function

C. Neuro sensory

D. Sensory function

389. Supporting cells of taste buds are called as_____________?
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A. Von ebner cells

B. Acini

C. Sustenticular cells

D. Taste cells

390. Which papillae are completely keratinized______________?
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A. Circumvallate

B. Filiform

C. Fungiform

D. Foliate

391. Long connective tissue papillae and keratinized epithelia are a feature of these parts of oral mucosa____________?
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A. Hard and soft palate

B. gingiva and alveolar mucosa

C. Hard palate and gingiva

D. Buccal andalveolar mucosa

392. Oral tissue for microscopic examination is prepared by_______________?
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A. Frozen and sectioned

B. Embedded in paradion and sectioned

C. All of the above

D. Specimens ground into thin sections

E. Embedded in paraffin and sectioned

393. Accentuated incremental lines in dentin are______________?
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A. Incremental lines of retzius

B. Contour lines lines of owen

C. None of the above

D. Incremental lines of von Ebner

394. The mucous membrane of cheeks and lips_____________?
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A. None of the above

B. It attached to buccinator muscle in cheeks

C. It attached to orbicularis oris in lips

D. A & B are correct
395. Cells of the spinous layer are generally_______________?
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A. None of the above

B. Larger than the basal cells

C. Smaller than the basal cells

D. same size as that of basal cells

396. perikymata are the external surface manifestations of_____________?
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A. Pellicle

B. Enamel rods

C. Nasmyths membrane

D. Incremental lines of retzius
397. Jacobsons organ is________________?
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A. Auxillary olfactory sense organ

B. Ellipsoid/Cigar shaped

C. All of the above

D. Undergoes degeneration after 4 months of intrauterine life

398. Basement membrane________________?
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A. Contains lamina lucida & Lamina dura

B. consists of desmosomes and hemi desmosomes

C. Consists luratihyaline granules

D. consists of lamina densa and lamina lucida
399. The oral epithelium is attached to the enamel via_______________?
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A. Hemidesmosomes

B. Desmosomes

C. Reticular fibers

D. Collagen fibers

400. Vonebilers glands open into which papilla_____________?
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A. Circumvallate

B. Foliate

C. Filiform

D. Fungiform