embryo

• True or False: Anodontia may occur in the initiation stage of tooth development.

  True
• The structure responsible for root development?

  A. OEE

  B. IEE

  C. Odontoblastic process

  D. Cervical loop

  D. Cervical loop
• Which of the following statements concerning pigmentation in the oral cavity is correct?

  A. melanin is formed by epithelial basal cells

  B. Pigmentation is most noticeable in the alveolar mucosa.

  C. Number of melanocytes differs according to clinical appearances.

  D. Pigmentation serves no function in the oral cavity.

  D. Pigmentation serves no function in the oral cavity.
• The macrophages found in the connective tissue are derived from:

  A. Monocytes

  B. Neutrofils

  C. Basophils

  D. Giant cells

  A. Monocytes
• Which type of blood cell is directly responsible for immunoglobulin production?

  A. Nuetrophils

  B. Basophils

  C. Plasma cells

  D. Mast cells

  C. Plasma cells
• A white ridge of raised calloused tissue that extends horizontally:

  A. Lines Alta

  B. Linea albea

  C. Ankyloglossia

  D. Fordyce granules

  B. Linea albea
• The mandibular arch during the embryonic period is the:

  A. Fusion of the two mandibular processes.

  B. Swelling found superior to the stododeum

  C. Structure that gives rise to the lateral nasal

  D posterior portion of the hard palate

  A. Fusion of the two mandibular processes.
• The proper name for the sublingual duct is called:

  A. Wharton's duct

  B. Bartholins duct

  C. Stensons duct.

  D. Both a and b

  B. Bartholins duct
• Dental fluorosis with intrinsic sting is caused by

  A. Systemic fluoride.

  B. Topical fluoride.

  C. Acidulated phosphorus fluoride.

  D. Stannous fluoride.

  A. Systemic fluoride.
• Which of the following structures separate the epithelium from the connective tissue?

  A. Submucosa.

  B. Basement membrane.

  C. Periostium

  D. Keratin layer

  B. Basement membrane.
• In a healthy situation, that alveola crest is ________ apical to the CEJ

  A. 1 to 2 mm.

  B. 2-3 mm

  C. 3-4 mm

  D. 4-5mm

  A. 1 to 2 mm.
• Which of the following describes a pronounced band present on the cross section of both enamel and dentin due to the trauma of birth?

  1. Line of Retzius

  2. Imbrication line of Von Ebner

  3. Neonatal line

  4. Contour line of Owen,

  C. Neonatal line
• The ______ is the largest dentist and most conspicuous organelle in the cell when it's viewed microscopically.

  A. Nucleus.

  B. Nucleolus

  C. Endoplasmic Reticulum

  D. Golgi complex

  A. Nucleus.
• True or False: Facial development is completed during the 12th week of prenatal development

  True
• The Freeman cecum of the tongue is a

  A. Groove pointing toward the pharynx

  B. Median line demarcating the fusion of the tongue.

  C. Depression at the Apex of the sulcus terminalis

  D. Collection of diffuse tonsillar tissue.

  C. Depression at the Apex of the sulcus terminalis
• The junctional epithelium is______ Then other gentle tissue, do it fewer demosomal junctions and increased intercellular spaces

  A. More permeable.

  B. Less permeable.

  C. Non-permeable.

  D. Impermeable.

  A. More permeable.
• If the parallel shelves are unable to fuse properly, during pedal development, there may be a form of a

  A. Cleft lip

  B. Ankyloglossia

  C. Clef palate

  D. Spina bifida.


  C. Clef palate
• True or False The tongue develop during the 4th to eight weeks of prenatal development


  True
• The primitive streak forms in the embryonic disc, causing

  A. Initiation of palatal development.

  B. Bilateral symmetry.

  C. Fusion of the mandibular processes.

  D. Disintegration of the oropharyngeal membrane

  B. Bilateral symmetry.
• What phase of mitosis donthe daughter cells separate?

  A. Prophase

  B. Telophase.

  C. Anaphase.

  D. Metaphase.

  B. Telophase.
• Enamel matrix is produced by the _____ cells.

  A. ameloblasts

  B. Odontoblast

  C. Fibroblast

  D. Cementoblast

  A. ameloblasts
• A type of cleft lip can result from the lack of fusion between

  A. Mandibular and maxillary processes.

  B medial, nasal, and maxillary processes

  C. Lateral nasal and medial nasal processes.

  D. Lateral nasal processes.

  B medial, nasal, and maxillary processes
• Which of the following basic tissue types is characterized by many different types of cells surrounded by large amounts of intercellular substance with vascularization present?

  1. Epithelium

  2. nerve tissue

  3. connective tissue

  4. muscle tissue

  2. Nervous Tissue
• The basal layer of oral mucosa generally has

  1. columnar-shaped cells

  2. Two cell layers

  3. Cells undergoing mitosis

  4. keratin being produced,

  3. Cells undergoing mitosis
• Secondary dentin forms;

  1. After the completion of the apical foramen.

  2. Before the completion of the apical foramen.

  3. Nearest to the dentinoenamel junction.

  4. In response to tooth trauma

  1. After the completion of the apical foramen.
• In cell division, what phase are chromosomes aligned at the equatorial plane?

  1. Prophase

  2. Metaphase

  3. Telophase

  4. Interphase

  2. Metaphase
• The clinical appearance of labial mucosa and buccal mucosa is described as;

  1. Opaque pink, shiny, moist, compressible

  2. Opaque Red, shiny and moist, non-compressible

  3. Dull, dry and non-compressible

  4. Opaque pink, dull, moist and compressible

  1. Opaque pink, shiny, moist, compressible
• The enamel matrix is secreted from each ameloblast from its;

  1. Tomes' granular layer

  2. Tomes' process

  3. REE

  4. Arrest lines

  2. Tomes Process
• Which of the following functions is performed by the Golgi complex in the cell?

  1. Metabolizes foreign compounds

  2. Produces Ribosomes

  3. Packages protein compounds

  4. Produces energy for the cell

  3. Packages protein compounds
• The primitive streak forms in the embryonic disc, causing:

  1. Initiation of palatal development

  2. Bilateral symmetry

  3. Fusion of the mandibular processes

  4. Disintegration of the oropharyngeal membrane

  2. Bilateral symmetry
• Pulp is a product of the:

  1. Dental Papilla

  2. Enamel organ

  3. Dental sac

  4. Epithelium

  1. Dental papilla
• The junctional epithelium is attached to tooth surface by way of _________.

  1. Cementum

  2. Epithelial attachment

  3. Attached gingiva

  4. Gingival sulcus

  2. Epithelial attachment
• When using an explorer, the cementum usually will feel;

  1. Spotty on the tooth surface

  2. Like a ledge on the tooth surface

  3. Smooth like glass

  4. uniform placement and roughness

  4. Uniform placement and roughness
• Hyperkeratinized tissue is associated with heat from smoking or hot fluids on the hard palate in the form of ___?

  1. Tori

  2. Fordyce's granules

  3. Linea alba

  4. Nicotinic stomatitis

  4. Nicotinic stomatitis
• They are covered in normal oral tissue, can vary in size, are slow growing, located on the mandibular arch;

  1. Palatal torus

  2. Mandibular exostosis

  3. Exostosis

  4. Mandibular tori

  4. mandibular tori
• True or False: A free gingival groove separates the sulcular gingiva from the marginal gingiva

  False
• In which week of prenatal development does facial development begin in the embryo?

  1. second

  2. third

  3. fourth

  4. fifth

  3. fourth
• The marginal gingiva mainly has a surface layer of______stratified squamous epithelium.

  1. Orthokeratinized

  2. Parakeratinized

  3. Non keratinized

  4. None of the above

  1. orthokeratinized
• During the cap stage of tooth development, the tooth germ consists of:

  1. Enamel organ and dental sac.

  2. Enamel organ and dental papillae

  3. Enamel organ, dental sac, and dental papilla

  4. Dental sac and dental papilla

  3. Enamel organ, dental sac, and dental papilla
• ______ is formed after the completion of the apical foramen and continues to form throughout the life of the tooth.

  1. Primary dentin

  2. Secondary dentin

  3. Tertiary dentin

  4. None of the above

  2. Secondary dentin