oral histology MCQs – Page 18

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

oral histology Mcqs
341. Extracted teeth should be preserved in_____________?
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A. Saline

B. Xylene

C. 10% alcohol

D. 10% Formalin
342. The red zones of lips have_____________?
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A. very small number of sebaceous glands, if any

B. 30% Sebaceous glands

C. 75% sebaceous glands

D. Absolutely no sebaceous glands

343. Difference between the skin and mucosa of cheek is_______________?
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A. Keratinized mucosa of cheek

B. Rete pegs

C. Thick lamina propria on skin of cheek

D. Thin lamina and non keratinized mucosa of cheek
344. The first sign of future deciduous teeth as a thickening of oral ectoderm appears at about_____________?
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A. 25th day of Intra uterine life

B. 20 wks of Intra uterine life

C. 56th day of Intra uterine life

D. 34th day of Intra uterine life

345. Epithelial attachment is derived from____________?
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A. Dental sac

B. Reduced enamel epithelium

C. Dental papilla

D. Inner enamel epithelium

346. All of the following is lined by stratified squamous epithelium, except ?
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A. Oropharynx

B. Lips

C. Tongue

D. Roof of the soft palate
347. The range of level of fluoride secreted by the glands into the mouth is_____________?
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A. 0.006-0.007 ppm

B. 0.007-0.005 ppm

C. 0.004-0.005 ppm

D. 0.007-0.08 ppm

348. Biomechanism that unites the epithelium to the tooth surface is_____________?
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A. Internal basal lamina

B. Epithelial attachment

C. Junctional epithelium

D. Reduced enamel epithelium

349. Frozen sections can be used for the demonstration of_____________?
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A. Mucin

B. Fat

C. Cartilage

D. Iron

350. Specific stain for fat cells is___________?
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A. Eosin & haematoxylin

B. Cresyl violet

C. Sudan III

D. Carbol fuschin

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