medical MCQs – Page 156

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 Review each marked answer and report any item that may be outdated or unclear.

3101. Morphological stages of tooth development are explained based on_____________?
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A. Shape of tooth germ

B. Shape of enamel organ

C. Function of enamel organ

D. Shape of dental papilla

3102. The component of future T.M.J shows development at _____________?
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A. 10 weeks

B. 18 weeks

C. 6 weeks

D. 16 weeks

3103. Reversal lines which may be seen on the cribriform plate (alveolar bone proper) of the alveolar process indicate the cessation of____________?
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A. Osteoclastic activity

B. Osteoblastic activity

C. Healing activity

D. Myeloid activity

3104. All factors govering dentine permeability EXCEPT_______________?
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A. Diffusion coefficient

B. Smear layer

C. Length of dentinal tubules

D. Fluid convection
3105. Dark bonds that are present in enamel rods at intervals of 4 ?ms are______________?
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A. Cross striations

B. Hunter-Schregar bands

C. Neonantal bands

D. Striae of Retzius

3106. The 2nd most prominent cells in pulp are______________?
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A. Fibroblasts

B. Odontoblasts

C. defense cells

D. Histocytes or resting wandering cell

3107. Tomes firbres are____________?
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A. Type of sharpeys fibres

B. Originate from tomes granular layer

C. Odontoblastic processes in dental tubules

D. With out but not with in the dentin

3108. The primary response of the pulp to tissue destruction is_______________?
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A. Necrosis

B. Ulceration

C. Calcific degeneration

D. Inflammation
3109. Which of the following is correct?
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A. Cementum is more resistant to resorption than bone

B. Bone is more resistant to resorption than cementum

C. Both are equally resorbable

D. None of the above

3110. Which of the following is correct about serous glands_____________?
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A. All of the above

B. They contain secretory granules in the apical Cytoplasm and the secretion of granule content occurs by exocrytosis

C. They are specialized for the synthesis, storage and secretion of proteins

D. Serous cells are pyramidal in shape

3111. Which of the following groups of fibres are not attached to alveolar bone ?
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A. Horizontal

B. Apical

C. Transseptal

D. Oblique

3112. Accessory canals result from____________?
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A. Dividing epithelial bridges

B. Break in Hertwigs root sheath

C. Defects in cementogenesis

D. Adherent epithelial rests

3113. Ectodermal cells in tooth bud are responsible for_______________?
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A. Formation of cementum

B. Formation of pulp

C. Formation of periodontal ligament

D. Determination of shape of crown and root
3114. Which of the following dentinal layers is more mineralized______________?
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A. Circum pulpal dentin

B. Dentinal tubules

C. Inter tubular dentin

D. Peritubular dentin
3115. The cap stage in tooth development is characterized by_____________?
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A. reversal of functional polarity

B. morphodifferentiation

C. Formation of hammock ligament

D. Increased mitotic activity
3116. High levels of albumin is present in____________?
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A. Stellate reticulum

B. Inner enamel epithelium

C. Stratum intermedium

D. Outer enamel epithelium

3117. Temporary structures in enamel organ are (before enamel formation) ?
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A. Enamel knot

B. Enamel cord

C. Both A and B

D. Enamel Cuticle

3118. Which of the following is correct?
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A. Each rod is formed by 4 ameloblasts

B. Head of the rod is formed by one ameloblasts, and tail is formed by three other ameloblasts

C. Each ameloblast contributes to 4 different rods

D. All of the above
3119. The striking difference between enamel and other mineralized tissues is______________?
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A. Presence of incremental lines

B. Enamel has high reparative capacity

C. Most of organic component is lost during mineralization

D. Presence of high percentage of organic matrix

3120. The articular cartilage is characterized by all of the following features except_____________?
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A. It lacks the capacity to regenerate

B. It is avascular

C. It has a rich nerve supply

D. It is devoid of perichondrium