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Embryology > Chapter 2- First Week of Development > Flashcards

Chapter 2- First Week of Development Flashcards

1
Q

Meiosis I events

A

reduction division, homologues separate

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2
Q

Spermatogonia

A

sperm primordial germ cells

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3
Q

Oogonia

A

egg primordial germ cells

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4
Q

karyogamy

A

fusion of the 2 nuceli of the sex cells

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5
Q

FSH effects

A

Follicle stimulating hormone, stimulates development of ovarian follicles and production of estrogen by follicular cells

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6
Q

LH effects

A

Luteinizing hormone, triggers ovulation and stimulates follicle cells and corpus lutetium to release progesterone

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7
Q

hCG- human chorionic gonadotrophin

A

causes corpus luteum of pregnancy to form and allows for maintenance

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8
Q

gamete intrafallopian (intratubal) transfer

A

fertilization occurs in uterine tube; several oocytes and sperm placed in tube for fertilization to occur

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9
Q

Cleavage begins _____ hours after fertilization

A

30

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10
Q

Compaction and polarization occurs after _________

A

9 cell stage

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11
Q

morula time and # blastomeres

A

3 days post fertilization

12-32 blastomeres

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12
Q

Blastocyst cavity appears

A

4 days after fertilization

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13
Q

Blastocyst is made up of…

A

trophoblast

embryoblast

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14
Q

trophoblast

A

outer layer of blastocyst, placenta

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15
Q

embryoblast

A

inner layer, embryo

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16
Q

early pregnancy factor in maternal serum ______ after fertilization

A

24-48 hours

17
Q

blastocyst attaches to endometrial lining ____ after fertilization

A

6 days

18
Q

trophoblast differentiates into ___ and ___

A

cytotrophoblast

syncytiotrophoblast

19
Q

cytotrophoblast

A

inner layer of trophoblast

20
Q

syncytiotrophoblast

A

multinucleated outer layer of trophoblast that implants into endometrial lining

21
Q

early pregnancy factor role and method of secretion

A

immunosuppressant

secreted by trophoblast

Embryology (10 decks)

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