All Free Oral Histology MCQs with Answers

• A. 750 ml
• B. 450 ml
• C. 1500 ml
• D. 1000 ml

Explanation: The submandibular glands secrete roughly 500 to 700 mL of saliva per day, making 450 mL the closest listed estimate.

• A. Liver
• B. Pancreas
• C. Salivary glands
• D. Gastric glands

Explanation: Serous demilunes are crescent-shaped serous cells around mucous acini in mixed salivary glands, especially the submandibular and…

• A. None of the above
• B. Antibacterial action by secreting lysoenzymes and lactoferrin
• C. Synthesis of secretory glycoproteins by Kallidrein an enzyme in striated duct cells
• D. To convey the saliva secreted by the terminal secretory units to oral cavity

Explanation: The basic role of a salivary duct is to carry saliva from the terminal secretory units toward the oral cavity, while duct cells also…

• A. All of the above
• B. They contain secretory granules in the apical Cytoplasm and the secretion of granule content occurs by exocrytosis
• C. Serous cells are pyramidal in shape
• D. They are specialized for the synthesis, storage and secretion of proteins

Explanation: Serous cells are pyramidal protein-secreting cells with apical zymogen granules released by exocytosis, so all three statements describe…

• A. Major salivary glands
• B. Major & minor salivary glands
• C. Minor salivary glands
• D. Parotid gland

Explanation: Saliva is produced by both major glands, such as the parotid, submandibular, and sublingual glands, and numerous minor salivary glands.

• A. Sublingual and parotid
• B. submandibular and parotid
• C. Submandibular and sublingual
• D. Von Ebner

Explanation: The submandibular duct and the ducts of the sublingual gland open into the floor of the mouth.

• A. Hormones
• B. All of the above
• C. Chemicals
• D. Nerves

Explanation: Salivary secretion is unusual because it is controlled predominantly by autonomic nerves rather than directly by hormones.

• A. Bicarbonates
• B. Ammonia
• C. Amino acids
• D. Mucin

Explanation: Bicarbonate is the major buffering component that neutralizes acids and helps maintain salivary pH.

• A. 5.5
• B. 9.5
• C. 7.5
• D. 8.5

Explanation: Normal saliva is usually slightly acidic to neutral, commonly around pH 6.5 to 7.5, making 7.5 the closest option.

• A. Lip and posterior third of the hard palate
• B. Tongue and soft palate
• C. Retromolar area and hard palate
• D. Gingiva and anterior part of hard palate

Explanation: Minor salivary glands are widely distributed in the oral mucosa but are absent from the gingiva and anterior hard palate.

• A. 6 weeks
• B. 18 weeks
• C. 10 weeks
• D. 16 weeks

Explanation: The developing components of the temporomandibular joint become identifiable at about the tenth week of embryonic development; the later…

• A. Endochondral ossification only
• B. Both of the above
• C. Membranous ossification only
• D. None of the above

Explanation: The mandible forms mainly by intramembranous ossification, but secondary cartilages such as the condylar cartilage contribute through…

• A. Stapes
• B. Styloid process
• C. Malleus and incus
• D. Superior part of hyoid bone

Explanation: The second pharyngeal arch forms the stapes, styloid process, and superior part of the hyoid bone.

• A. It has a major role
• B. It has a minor role
• C. None of the above
• D. It does not have any role

Explanation: Meckel’s cartilage does not directly form the mandible, which develops mainly by intramembranous ossification lateral to it.

• A. Alveolar bone
• B. Whole face
• C. Mandible
• D. Basal bone

Explanation: The alveolar process develops in close association with developing teeth and largely disappears when teeth are absent.

• A. 6th week of IU
• B. 8th week of IU
• C. 10th week of IU
• D. 18th week of IUOral & Dental Care

Explanation: The dental papilla, which gives rise to the pulp, becomes identifiable during the eighth intrauterine week.

• A. Lymphocytes
• B. Histocytes
• C. Macrophages
• D. Undifferentiated mesenchymal

Explanation: Odontoblasts differentiate from ectomesenchymal cells of the dental papilla under the inductive influence of the inner enamel epithelium.

• A. Dental papilla
• B. Dental sac
• C. Odontoblasts
• D. Stellate reticulum

Explanation: The dental pulp develops from the ectomesenchymal dental papilla, which lies beneath the developing enamel organ.

• A. Cells of odontogenic layer
• B. Cells of dental follicle
• C. Cementoblasts
• D. Cells of the gingiva

Explanation: The dental follicle, or dental sac, is the ectomesenchymal tissue surrounding the developing tooth germ and gives rise to cementum…

• A. Enamel
• B. Cementum
• C. Dentin
• D. Bone

Explanation: Dentin is the first dental tissue to form, being deposited by odontoblasts before ameloblasts begin enamel formation.