5174660
Pregunta 1
Pregunta
Which of the following is the correct order?
Respuesta
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morphogenesis, histodifferentiation, ruffled membrane, secretion, smooth membrane, reduced enamel epithelium
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initial secretion, morphogenesis, histodifferentiation, smooth membrane, ruffled membrane, secretion, reduced enamel epithelium
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morphogenesis, initial secretion, histodifferentiation, ruffled membrane, secretion, reduced enamel epithelium, smooth membrane
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morphogenesis, histodifferentiation, secretions, ruffled membrane, smooth membrane, reduced enamel epithelium
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morphogenesis, histodifferentiation, secretions, smooth membrane, ruffled membrane, reduced enamel epithelium
Pregunta 2
Pregunta
Which of the following is incorrectly matched?
Respuesta
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Morphogenic... cuboidal cells and basement membrane
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Histodifferentiation... columnar cells and basement membrane dissolves
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Secretory... enamel rods begin to form
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Ruffled membrane maturation... allow Ca and phosphate in
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Reduction of enamel epithelium... basal lamina created
Pregunta 3
Pregunta
The interrod enamel is both the first and last type of enamel to be laid down. Most of the enamel matrix protein is Ameloblastin
Respuesta
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Both true
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True, false
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False, true
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Both false
Pregunta 4
Pregunta
Which of the following is incorrect?
Respuesta
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Amelogenin... limits lateral extension
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Ameloblastin...ameloblast adherence to enamel matrix
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MMP20- degrades amelogenin and ameloblastin
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Kallikren 4- expressed in early secretory phase
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none of the above
Pregunta 5
Pregunta
The DEJ has the most stress and therefore the least hardness. The greatest hardness can be found at the cusp tips due to greater mineralization and activity of matrix removal.
Respuesta
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Both true
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True, false
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False, true
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Both false
Pregunta 6
Pregunta
Striae of Retzius come from variations of enamel rod directions. Hunter Schreger bands are perpendicular to DEJ and enamel surface.
Respuesta
-
Both true
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True, false
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False, true
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Both false
Pregunta 7
Pregunta
Which of the following is correctly matched?
Respuesta
-
Enamel tufts... branch from DEJ into enamel surface
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Enamel lamellae... run from DEJ to enamel matrix
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Enamel spindles... are odontoblastic processes most often seen at cusp tips
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Hunter Schreger bands... are concentric
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Striae of Retzius... are perpendicular to DEJ
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