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Oral Bio > General Embryology > Flashcards

General Embryology Flashcards

1
Q

What makes up the first 8 weeks of gestation? (2)

A

Preimplantation and embryonic period

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2
Q

Each craniofacial structure has a….?

A

Primordium

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3
Q

After fertilization of the zygote mitosis leads to what?

A

Blastocyst

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4
Q

What structure implants into the uterus?

A

blastocyst

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5
Q

What is critical for craniofacial development?

A

BMP (Bone Morphogenic Protein)

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6
Q

HOX genes are the blue print for?

A

Develop limbs and spine

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7
Q

Msx Genes genes are the blue print for?

A

differentiation and proliferation

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8
Q

Shh (sonic hedgehog) genes are the blue print for?

A

induction of facial primordium

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9
Q

Dlx genes genes are the blue print for?

A

lateral border of the neural plate

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10
Q

What are Ca dependent adhesion molecules?

A

Cadherins

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11
Q

Neurectoderm progenitors express

A

N-CAM

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12
Q

Skin Ectoderm progen

A

L-CAM

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13
Q

After the zygote cleaves a few times it is called

A

morula

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14
Q

How long does a blastocyst endure for?

A

until 3 distinct germ layers have formed.

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15
Q

What things form during the embryonic period? (3)

A

Pharyngeal arches
Somite development
Face development

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16
Q

What occures during patterning in embryonic period?

A

spatial and temporal events

17
Q

Gastrulation is what?

A

Formation of 3 germ layers

18
Q

Dorsal cells are also known as?

A

epiblast layer

19
Q

Ventral cells are also known as?

A

Hypoblast layer

20
Q

Hypoblast and epiblast layers form from?

A

Germ Disk

21
Q

What cells form the true embryonic endoderm and mesoderm?

A

mesoblast cells

22
Q

what is the primitive mouth called in embryological development

A

stomodeum

23
Q

What part of the mesoderm forms cartilage, segmented muscles?

A

Paraxial

24
Q

What part of the mesoderm forms Kidneys, gonads?

A

Inetermediate

25
Q

What part of the mesoderm forms Heart, GUt?

A

Lateral Plate

26
Q

The neural tube expands to form what there parts?

A

Forebrain
Midbrain
Hindbrain

27
Q

What is it called when the neural crest cells fail to migrate to the facial region?

A

Treacher Collins Syndrome

28
Q

What causes the mesoderm to break apart?

A

attachment proteins from E to N

29
Q

What 3 tings happen post gastrulation?

A
  1. ) Differentiation of nervous system
  2. ) Formation/migration of the neural crest
  3. ) Embryo folding

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