21. The primary response of the pulp to tissue destruction is_______________? A. Necrosis B. Ulceration C. Calcific degeneration D. Inflammation ✅ The correct answer is option D. Inflammation.
22. Masticatory mucosa in the oral cavity covers the_______________? A. Floor of the mouth and soft palate B. Alveolar mucosa and vestibular fornix C. Lip and cheek D. Gingiva and hard palate ✅ The correct answer is option D. Gingiva and hard palate.
23. Total volume of saliva secreted by submandibular gland daily is______________? A. 750 ml B. 450 ml C. 1500 ml D. 1000 ml ✅ The correct answer is option B. 450 ml.
24. True about direction of enamel rods______________? A. They originate at right angle to dentin surface B. They are almost vertical near the incisal edge (or) cusp tip areas C. In the cervical third of deciduous crowns they are almost horizontal in direction D. In cervical region of permanent teeth, they deviate in apical direction ✅ The correct answer is option E. All of the above.
25. Anchoring fibrills are composed of_____________? A. Type V and VII collagen B. Type I and III collagen C. Type IV collagen D. Type IV and III Collagen ✅ The correct answer is option A. Type V and VII collagen.
26. Aging process affects pulp tissue by_____________? A. Decreasing the size and shape of pulp tissue and cellular component B. Increase cellular component at the expenses of fibre component C. Increases vascularity of the pulp D. Decrease the calcific component of the pulp ✅ The correct answer is option A. Decreasing the size and shape of pulp tissue and cellular component.
27. Enamel tufts are_______________? 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. Odontoblastic processes extending into enamel D. None of the above ✅ The correct answer is option B. Tuft like structure arising from dentin-enamel junction towards enamel surface.
28. Accentuated incremental lines in dentin due to disturbances in matrix and mineralization process is_____________? A. Incremental lines of retzius B. Incremental lines of vonebner C. Contour lines of owen D. None of the above ✅ The correct answer is option C. Contour lines of owen.
29. Cellular cementum and compact bone contain____________? A. Sharpehy’s fibres and elastic fibres B. Collagen fibres and blood vessels C. Canaliculi and incremental lines D. Lacunae and elastic fibres ✅ The correct answer is option C. Canaliculi and incremental lines.
30. The major cells seen in gingiva are______________? A. Fibro blast B. Odontoblasts C. Cementoblasts D. Merkel cells ✅ The correct answer is option A. Fibro blast.