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WorksheetsInteractive Quiz 1.1
Total questions: 20
Worksheet time: 20mins
Neural crest cells
originate from the endodermal layer.
play a crucial role in enamel formation.
contribute to the formation of the notochord.
migrate extensively to various locations throughout the embryo.
Which of the following statements relates to the role of Meckel's cartilage during mandible development?
Mandibular bone formation occurs lateral to Meckel's cartilage
Meckel's cartilage is directly replaced by the developing mandibular bone
The primary ossification centre for the mandible is located within Meckel's cartilage
Meckel's cartilage serves as a template for mandibular formation through endochondral ossification
All of the following are parts of the enamel organ except
Internal enamel epithelium
External enamel epithelium
Dental follicle
Stellate reticulum
The enamel organ, dental papilla and dental follicle together form the
Tooth germ
Dental lamina
Enamel matrix
Tooth bud
The cervical loop contains:
Stellate reticulum and stratum intermedium
Internal and external enamel epithelium
Periodontal ligament
Papilla cells
Which of the following explains why the tongue temporarily prevents the fusion of the palatal shelves?
It secretes inhibitory signals
It fuses with the primary palate
It ossifies before palatal formation
Palatal shelves initially grow vertically on either side of it
Which of the following statements BEST describes the role of pharyngeal arches?
They form the neural tube
They form only the muscles of the face
They directly become the pharynx without differentiation
They are transient structures that contribute to skeletal, muscular, vascular and nerve components
Which structure separates the stomodeum from the foregut during early development?
Buccopharyngeal membrane
Maxillary process
Pharyngeal arch 1
Mandibular process
During amelogenesis
ameloblastin forms a major component of the enamel matrix.
ameloblasts secrete a collagenous organic matrix.
ameloblasts retreat and form enamel rods.
ameloblasts retreat toward the pulp.
Perikymata are the external surface manifestations of
enamel lamellae.
enamel spindles.
striae of Retzius.
Hunter-Schreger bands.
Regarding dentinogenesis:
It occurs during the late cap stage
Degradation of the basal lamina initiates the process
The dentinal matrix includes dentine phosphoproteins
Matrix deposition starts at the cervical region and ends beneath the cusps
Regarding secondary dentine:
It forms rapidly
It includes mantle dentine
It is always circumpulpal dentine
It forms before root completion
Which of the following correctly identifies a feature of the cell-free zone of Weil?
It contains densely packed fibroblasts
It houses the nerve plexus of Raschkow
It forms a pseudostratified layer of odontoblasts
It is the primary site of thick Type I collagen fibre bundles
Dentinal tubules contain:
Nerve fibre terminal
Collagen
Odontoblastic processes
Blood vessels
Bone adjacent to the periodontal ligament that contains Sharpey's fibres is known as:
lamina dura
lamina propria
lamina densa
bundle bone
Which is the entrapped cells that lie in the lacunae of alveolar bone?
Osteoblasts
Osteocytes
Osteoclasts
Osteoprogenitor cells
Cementicles are found in the:
gingiva
alveolar bone
periodontal ligament
cementum
The cells rest of Malassez in the periodontal ligament are derived from:
lamina propria
dental pulp
vestibular lamina
odontogenic epithelium
Which cells in the oral epithelium are responsible for immune response?
Keratinocytes
Langerhans cells
Merkel cells
Melanocytes
Identify which type of tissue is absent in the gingiva.
Oral epithelium
Reticular layer
Papillary layer
Submucosa
