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Medical Science Mcqs 5254 MCQs [All-Courses]

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Medical Science is the study of human health, diseases, prevention, and treatment, focusing on diagnosis, patient care, and medical research to improve healthcare outcomes.

All Topics  5254

Dentino enamel junction is_________________?
A Non-scalloped
B Straight
C Scalloped and the convexities are directed towards dentin
D Scalloped and the convexities are directed towards enamel
Correct Answer: Scalloped and the convexities are directed towards dentin
The diameter of the rod is______________?
A 4 μ m
B 9 μ m
C 7 μ m
D 2 μ m
Correct Answer: 4 μ m
Inorganic content of enamel is about______________?
A 35%
B 50%
C 4%
D 96%
Correct Answer: 96%
calcification in enamel starts at____________?
A Enamel matrix
B Root
C CEJ
D DEJ
Correct Answer: DEJ
The enamel has no capacity of self repair because______________?
A It has only a small percent of organic content
B Its formative cells are lost once it is completely formed
C It is essentially a keratin tissue and has no blood vessels
D It has no direct connection with the active cells of the dental pulp
Correct Answer: Its formative cells are lost once it is completely formed
The formative cells of which of the following dental tissues disappear once tissue is formed___________?
A Enamel
B Dentin
C Periodontal ligament
D Cementum
Correct Answer: Enamel
On microscopic examination enamel rods have___________?
A Key hole appearance in cross section
B Paddle appearance in cross section
C Lanullate appearance in cross-section
D None of the above
Correct Answer: Key hole appearance in cross section
All are true about the striae of retzius except___________?
A Constitute the rest lines with in the enamel rods
B Have high inorganic content
C They are areas of increased porosity
D Allow the movement of water and small ions
Correct Answer: Have high inorganic content
Ionic exchange between enamel surface and environment______________?
A Does not take place once enamel surface and invironment
B Stops after 2 years of eruption
C Continues till adult life
D Continues through out life
Correct Answer: Continues through out life
Incremental lines of retzius are seen in______________?
A Enamel
B Dentin
C Cementum
D Pulp
Correct Answer: Enamel
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