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Zak, Embryology > Final: Development of Head/Neck II > Flashcards

Final: Development of Head/Neck II Flashcards

1
Q

What is the term for enamel forming cells of the tooth?

A

Ameloblasts

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2
Q

What are the C-shaped bands of oral ectoderm overlying neural crest mesenchyme?

A

Dental lamina

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3
Q

What are the epithelial downgrowths overlying neural crest mesenchyme?

A

Tooth bud

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4
Q

What is the stage with the inverted cup-shaped layers of ectoderm capped by stellate reticulum and covering a mass of mesenchyme (dental papilla)

A

Cap stage

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5
Q

What is the stage with the inverted cup-shaped layers of ectoderm capped by stellate reticulum and covering a mass of mesenchyme (dental papilla)

A

Cap stage

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6
Q

What is the stage with the cone-shaped primordium covered by stellate reticulum overlying the enamel organ?

A

Bell stage

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7
Q

What forms the outer most layer of the dental papilla?

A

Odontoblasts

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8
Q

What is the term for a condensation of mesenchymal cells around the developing tooth which form the cementum & periodontal ligament?

A

Dental sac

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9
Q

What factor is necessary for tooth development past the bud stage?

A

Pax-9

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10
Q

_____ inhibits _____ & creates non-tooth-forming spaces.

A

BMP-4

FGF-8

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11
Q

_____ stimulates production of BMP-4, Shh, & FGF-8 from the dental lamina.

A

Lef-1

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12
Q

Branching pattern of the salivary glands depends heavily on _____.

A

Shh

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13
Q

Problems in the abiliy of the prechrodal plate and anterior endoderm to secrete _____ causing defects in the formation of the forebrain is termed what?

A

Shh

Holoprosencephaly

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14
Q

BMP-4 stimulates _____ to produce a tooth bud>

A

Msx-1

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15
Q

Presence of _____ in lingual region, suppresses BMP-4/Msx-1 pathway and therefore, tooth formation.

A

Osr-2

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16
Q

Dlx-1 & Dlx-2 contribute to formation of the _____ teeth in the _____ jaw.

A

Molar

Upper

17
Q

Barx-1 contributes to formation of the _____ molar teeth in the _____ jaw.

A

Molar

Lower

18
Q

Barx-1 (induced by FGF-8) contributes to formation of the _____ molar teeth in the _____ jaw.

A

Molar

Lower

19
Q

_____ is expressed only in the area where incisors will form?

A

Islet-1

20
Q

_____ is expressed only in the area where molars will form by acting upstream of Barx-1.

A

Pitx-1

21
Q

Expression of _____ outlines the entire ectodermal dental field & epithelium of the individual tooth germs.

A

Pitx-2

Zak, Embryology (25 decks)

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