701. Extracellular matrix of the connective tissue of the pulp is composed of:
A. Collagen fibers only.
B. Ground substance only.
C. Both 1&2.
DNon of the above.

702.Pericytes are contractile cells that surround the endothelial cells of:
A. Arterioles.
B.Venules.
C. Lymph vessels.
D. Capillaries.

703. Pulp tissue has receptors for:
A. Heat.
B. Pain.
C. Pressure.
D. All of the above.

704. The PDL fibers running between two adjacent teeth:
A. Belong to the dento-alveolar group.
B.Are gingival fibers.
C. Are transseptal fibers.
D. Are oxytalan fibers.

705. Which of the following is not true of the alveolodental periodontal fibers? They:
A. Are organized into bundles with different orientation.
B. Are derived from epithelial rests of Malassez.
C.Undergo continuous remodeling.
D. Are formed and partially resorbed by fibroblasts.

706. Which of the following is not present in the periodontal ligament?
A. Epithelial rests of Malassez.
B. Fibroblasts.
C.Cementoblasts.
D. Osteocytes.

707. Which of the following principal fibers groups constitutes the main attachment of the tooth?
A. Oblique group.
B. Apical group.
C. Horizontal group.
D.Alveolar group.

708. Which of the following groups of tissues comprise the periodontium?
A. Alveolar bone, periodontal ligament, cementum.
B. Periodontal ligament, cementum, gingiva.
C. Cellular cementum, periodontal ligament, alveolar bone.
D.Cementum, alveolar bone, periodontal ligament, gingiva.

709. The width of the periodontal ligament:
A. It is thiner when teeth are functioning normally.
B. It is narrowest at the level of the midroot area.
C. It becomes wider with aging.
D. It is of uniform width around multi-rooted teeth.

710. The periodontal ligament develops from:
A. Dental organ.
B. Dental sac.
C. Dental papilla.
D. Dental lamina.

NOTE
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