RSL - Repro - Embryology Flashcards

1
Q

Sonic Hedgehog gene: Production

A

at base of limbs

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2
Q

Sonic Hedgehog gene: action

A

Patterning along anterior to posterior axis

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3
Q

Wnt-7 gene: production

A

At apical ectodermal ridge

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4
Q

Wnt-7 gene: action

A

Patterning along Dorsal-ventral axis

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5
Q

FGF gene: production

A

Apical ectodermal ridge

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6
Q

FGF gene: Action

A

Stimulates mitosis of underlying mesoderm –> lengthening of limb

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7
Q

Homeobox (Hox) genes: action

A

Segmentation of embryo in Craniocaudal direction. (mutations –> appendages in wrong locations)

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8
Q

HCG and implantation of blastocyst: Week _

A

1

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9
Q

Bilaminar disk (epiblast, hypoblast): Week _

A

2

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10
Q

Gastrulation: Week _

A

3

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11
Q

Neural tube formation: week _

A

4

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12
Q

Extremely sensitive to teratogens: Weeks _

A

4-8

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13
Q

Heart beats: week _

A

4

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14
Q

4 limbs: week_

A

4

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15
Q

Genetalia: week_

A

10

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16
Q

Embyologic origins: Lens of eye

A

Surface ectoderm

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17
Q

Embyologic origins: Sensory organs of ear

A

Surface ectoderm

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18
Q

Embyologic origins: Anal canal below pectinate line

A

Surface ectoderm

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19
Q

Embyologic origins: Oral cavity

A

Surface ectoderm

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20
Q

Embyologic origins: Parotid, sweat, mammary glands

A

Surface ectoderm

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21
Q

Embyologic origins: Oligodendrocytes

A

Neuroectoderm

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22
Q

Embyologic origins: PNS

A

Neural crest

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23
Q

Embyologic origins: Shwann cells

A

Neural crest

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24
Q

Embyologic origins: Melanocytes

A

Neural crest

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25
Q

Embyologic origins: Parafollicular (C ) cells

A

Neural crest

26
Q

Embyologic origins: Pia and arachnoid

A

Neural crest

27
Q

Embyologic origins: Bones of skull

A

Neural crest

28
Q

Embyologic origins: Aorticopulmonary septum

A

Neural crest

29
Q

Embyologic origins: Serous linings of body cavities

A

Mesoderm

30
Q

Embyologic origins: Spleen

A

Mesoderm

31
Q

Embyologic origins: Testes/ovaries

A

Mesoderm

32
Q

Embyologic origins: Dermis

A

Mesoderm

33
Q

Embyologic origins: Vagina

A

Mesoderm

34
Q

Embyologic origins: cardiovascular structures

A

Mesoderm

35
Q

Embyologic origins: kidneys

A

Mesoderm

36
Q

Embyologic origins: Adrenal cortex

A

Mesoderm

37
Q

Embyologic origins: Bone

A

Mesoderm

38
Q

Embyologic origins: Odontoblasts

A

Neural crest

39
Q

Embyologic origins: Astrocytes

A

Neuroectoderm

40
Q

Embyologic origins: Ependymal cells

A

Neuroectoderm

41
Q

Embyologic origins: Gut tube

A

Endoderm

42
Q

Embyologic origins: most of urethra

A

Endoderm

43
Q

Embyologic origins: Luminal epithelial derivatives

A

Endoderm

44
Q

Embyologic origins: Liver

A

Endoderm

45
Q

Embyologic origins: Pancreas

A

Endoderm

46
Q

Embyologic origins: Lungs

A

Endoderm

47
Q

Embyologic origins: Eustatian tube

A

Endoderm

48
Q

Embyologic origins: thymus

A

Endoderm

49
Q

Embyologic origins: Parathyroid

A

Endoderm

50
Q

Embyologic origins: Thyroid follicular cells

A

Endoderm

51
Q

Embryologic origins: ANS

A

Neural crest

52
Q

Errors in morphogenesis: Disruption

A

secondary breakdown of previously normal tissue (amniotic band)

53
Q

Errors in morphogenesis: Deformation

A

Extrinsic disruption; occurs after embryonic period

54
Q

Errors in morphogenesis: Malformation

A

Intrinsic disruption; Occurs during embryonic period (3-8weeks)

55
Q

Monozygotic twinings days: Dichorionic Diamnionic

A

0-4 days (25%) (2 cell stage)

56
Q

Monozygotic twinings days: monochorionic Diamnionic

A

4-8 days (75%) (Morula)

57
Q

Monozygotic twinings days: Monochorionic Monoamniotic

A

8-12 days (

58
Q

Monozygotic twinings days: monochorionic monoamniotic conjoined twins

A

> 13 days (formed embryonic disk

59
Q

Allantois –> (embryonic derivation)

A

Umbilical arteries and Vein

60
Q

Allantois –> (adult)

A

Urachus

61
Q

Allantois formation: week_

A

3

62
Q

Vitelline duct obliteration: week_

A

7