Tooth Development I

During morphogenesis, the teeth site is established, dental lamina is formed and appearance of tooth germs.

• True

• False

The FgF-8 is expressed in the _______ and induces the secretion of the _________ from the _________.

• ectomesenchyme, LIM-homeobox gene, oral epithelium

• oral epithelium, Limhomeobox gene, ectomesenchyme

• oral epithelium, ectomesenchyme, Limhomeobox gene

• Limhomeobox gene, ectomesenchyme, oral epithelium

The field model suggests that an incisor field contains incisor transcription factors at all future tooth sites.

• True

• False

The clone model suggests that the epithelium programs a set of ectomesenchyme to produce teeth of a specific type.

• True

• False

Oral epithelium is derived from ectodermal layer.

• True

• False

Ectomesenchymal cells are derived from

• neural crest cells.

• endoderm.

• mesoderm.

• ectoderm.

Identify the structures in the following picture. A is ectomesenchyme and B is oral epithelium.

• True

• False

Tooth germs are formed due to interaction between oral epithelium and second arch mesenchyme.

• True

• False