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Flashcards in RSL - Repro - Embryology Deck (62)
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1

Sonic Hedgehog gene: Production

at base of limbs

2

Sonic Hedgehog gene: action

Patterning along anterior to posterior axis

3

Wnt-7 gene: production

At apical ectodermal ridge

4

Wnt-7 gene: action

Patterning along Dorsal-ventral axis

5

FGF gene: production

Apical ectodermal ridge

6

FGF gene: Action

Stimulates mitosis of underlying mesoderm --> lengthening of limb

7

Homeobox (Hox) genes: action

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

8

HCG and implantation of blastocyst: Week _

1

9

Bilaminar disk (epiblast, hypoblast): Week _

2

10

Gastrulation: Week _

3

11

Neural tube formation: week _

4

12

Extremely sensitive to teratogens: Weeks _

4-8

13

Heart beats: week _

4

14

4 limbs: week_

4

15

Genetalia: week_

10

16

Embyologic origins: Lens of eye

Surface ectoderm

17

Embyologic origins: Sensory organs of ear

Surface ectoderm

18

Embyologic origins: Anal canal below pectinate line

Surface ectoderm

19

Embyologic origins: Oral cavity

Surface ectoderm

20

Embyologic origins: Parotid, sweat, mammary glands

Surface ectoderm

21

Embyologic origins: Oligodendrocytes

Neuroectoderm

22

Embyologic origins: PNS

Neural crest

23

Embyologic origins: Shwann cells

Neural crest

24

Embyologic origins: Melanocytes

Neural crest

25

Embyologic origins: Parafollicular (C ) cells

Neural crest

26

Embyologic origins: Pia and arachnoid

Neural crest

27

Embyologic origins: Bones of skull

Neural crest

28

Embyologic origins: Aorticopulmonary septum

Neural crest

29

Embyologic origins: Serous linings of body cavities

Mesoderm

30

Embyologic origins: Spleen

Mesoderm