Test
CF 22-23 Odontogenesis
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Preguntas del test (13)
1Which is the correct order?
- ABud, cap, placode, bell, root
- Bbud, bell, cap, root, placode
- Cplacode, bud, cap, bell, root
- Dplacode, cap, bud, bell, root
- Ebud, placode, cap, bell, root
2Which of the following is correct about the primary epithelial band
- AThickening of the oral epithelium seen at 7th week
- BTooth formation is limited mesiodistally
- CBecomes dental lamina upon invasion of the ectomesenchyme
- Dbecomes lamina and thickens at 7th week
- Eall of the things
3Which of the following is incorrect?
- AThe primary epithelial band forms both the dental and vestibular lamina
- BThe dental lamina comes from the dental placode
- CThere are 16 dental placodes per arch
- DThickening at the primary epithelial band indicates formation of future teeth
- ESHH and PITX2 are expressed in the primary epithelial band
4During the cap stage, which of the following occurs?
- APositively charged proteoglycans are formed to attract water
- BLots of mitosis for formation of cervical loop
- CEpithelial cells form outer enamel
- Dproteoglycans and mitosis
- Eproteoglycans and enamel
5Which of the following is incorrectly matched?
- Aenamel organ... cell rest of Malassez
- Bdental papilla... pulp tissue
- Cdental follicle... periodontal ligament
- Ddental papilla... junctional epithelium
- Edental follicle... alveolar bone
6Which of the following is incorrect?
- AEnamel pearls can form during the late bell stage
- BEnamel knots do not divide and are organizing centers for cusp formation
- CThe major protein of dentin is type 3 collagen
- DAll of the above
- EType 3 collagen and enamel knots
7All succedaneous teeth form from lingual extensions of the dental lamina. Molars also develop from lingual extensions of the dental lamina
- ABoth true
- BTrue, False
- CFalse, True
- DBoth false
8Which of the following is false?
- ASome of the cervical loop cells form cell rests of Malassez
- BThe periodontal ligament is a special ligament made from epithelial cells
- CSome Hertwig's epithelial root sheath cells become epithelial cell rests of Malassez
- DNone of the above
- EEpithelial-mesenchymal interactions induce dentinogenesis, root morphogenesis, and cementum formation
9Mo SHH, mo cusps? Insulin-like growth factor is associated with Hertwig's epithelial root sheath?
- ABoth true
- BTrue, false
- CFalse, true
- DBoth false
10FGF4 is involved in Hertwig's epithelial root sheath formation. FGF10 is involved in cusp formation
- ABoth true
- BTrue, false
- CFalse, true
- DBoth false
11According to the Homeobox Code Theory, BMP4 and FGF 8/9 ratios determine tooth type. Anterior-posterior axis set by PMP4 posteriorly and FGF 8/9 anteriorly.
- ABoth true
- BTrue, false
- CFalse, true
- DBoth false
12In homeobox theory, signaling molecules determine tooth type and axis within primary epithelial band. Clone theory states that clones give inhibitory signals to stop formation of additional teeth
- ABoth true
- BTrue, false
- CFalse, true
- DBoth false
13Which of the following is incorrectly matched?
- ADental follicle...osteoblasts
- BDental papilla... odontoblasts
- CEnamel organ... cementoblasts
- DDental follicle... fibroblasts
Información
- Descripción
- CRAIG
- Autor
- Liz Maas
- Idioma
- English
- Visitas
- 1.002
- Historial
- Creado el 18 abr 2016 · actualizado el 24 may 2016
- Etiquetas
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