medical MCQs – Page 503

Practise multiple-choice questions from medical for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

medical Mcqs

1. oral anatomy 2. microbiology 3. oral pathology and medicine 4. physiology 5. biochemistry 6. general anatomy 7. dental materials 8. pharmacology 9. pathology 10. oral histology

10041. The most abundant principle fibre group in periodontal ligament is____________?
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A. Transeptal

B. Horizontal

C. Apical

D. Oblique

10042. The hertwigs epithelial root shealth is essential to development of the root because it_______________?
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A. Remians as an essential constituents of the periodontal ligament

B. Given rise to odontoblasts that lay down dentin of the root

C. Moulds the shape of roots and stimulates differentiation of odontoblasts

D. Gives rise to cementoblasts that produce cementum of the root

10043. Outer and inner enamel epithelium first seen in____________?
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A. Advanced bell stage

B. Bud stage

C. Bell stage

D. Cap stage

10044. During the formation of primary teeth_______________?
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A. Dentin forms faster than enamel

B. Enamel forms faster than dentin

C. Enamel forms more cervically than dentin

D. Processes of their cells remain in content with each other

10045. Cementum_____________?
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A. Does not contain collagen fibres

B. Often overlaps the enamel

C. Is derived from the sheath of hertwig

D. Is acellular in the apical third of the tooth

10046. Disturbance during the morphodifferentition stage of tooth development will result in______________?
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A. Change in number of teeth

B. Ameloblastoma

C. Change in form and shape of the teeth

D. Hypoplasia

10047. Incremental lines of Retzius appear_____________?
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A. As lines in the enamel running at right angles to the enamel surface

B. As lines in the dentin running at right angles to the dentino-enamel junction

C. In dentin and follow the appositional pattern

D. In enamel and follow the apposition pattern

10048. Which of the following statement is true______________?
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A. The apical foramen is surrounded by cementum

B. Cementum is thinnest at CEJ (20-50?m)

C. Cementum is thickest towards the apex (150-200?m)

D. All of the above

10049. Blunt cell processes seen on the developing ameloblasts are celled as________________?
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A. Tomes fibres

B. Tomes layer

C. Odontoblastic processes

D. Tomes processes

10050. 1st formed dental tissue______________?
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A. Enamel

B. Bone

C. Dentin

D. Cementum

10051. Inorganic content of cementum is______________?
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A. 60 to 65%

B. 45 to 50%

C. 55 to 60%

D. 50 to 55%

10052. The 2nd most prominent cells in pulp are______________?
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A. defense cells

B. Odontoblasts

C. Fibroblasts

D. Histocytes or resting wandering cell

10053. The primary response of the pulp to tissue destruction is_______________?
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A. Inflammation

B. Necrosis

C. Calcific degeneration

D. Ulceration

10054. Morphological stages of tooth development are explained based on_____________?
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A. Function of enamel organ

B. Shape of enamel organ

C. Shape of dental papilla

D. Shape of tooth germ

10055. Incremental lines of retzius are seen in______________?
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A. Dentin

B. Enamel

C. Pulp

D. Cementum

10056. Maximum fluoride content is seen in_____________?
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A. Enamel

B. Dentin

C. Dental cementum

D. Dental pulp

10057. Ratio of diameter of enamel rods in the DEJ to the enamel surface is______________?
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A. 2:01

B. 1:04

C. 1:02

D. 1:1

10058. Hertwigs epithelial root sheath is made up of_______________?
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A. Hyaline layer of Hopewell-smill

B. Stratum intermedium

C. Stellate reticulum

D. Outer and inner enamel epithelium

10059. True about osteoclasts_____________?
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A. All of the above are true

B. The plasma membrane of osteoclasts adjacent to bone that is being resorbed is known as striated or ruffled border

C. Contain lysosomes with acid phosphates

D. Monocytes are precursor cells of osteoclasts

10060. Nutritional supply of the ameloblasts during most of their life cycle is from the_____________?
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A. Reduced dental organ

B. Odontoblastic processes

C. Dental sac

D. Dental pulp

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