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IMG1004: OB-GYN > week 4 > Flashcards

week 4 Flashcards

1
Q

Cell division that produces gametes- will have ½ normal somatic chromosomes components (Sex cells)

A

meiosis

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2
Q

of cells & chromosomes in meiosis

A

4 cells 23 chrom

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3
Q

division of a single cell that produces 2 identical cells with the same number of chromosomes

A

mitosis

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4
Q

Allows random assortment of maternal and paternal chromosomes between the gametes

A

meiosis

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5
Q

of cells and chromosomes in mitosis

A

2 cells, 46 chromosomes

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6
Q

What is the role of Zona Pellucida

A

sperm binding and protetction

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7
Q

Where does fertilization taking place

A

ampulla portion of Fallopian tubes

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8
Q

What does the term zygote means?

A

fertilized ovum

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9
Q

What gamete determinate gender of the human offspring

A

sperm

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10
Q

What is the name of the dividing cell right after conception

A

zygote

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11
Q

What happen during cleavage

A
  1. Mitosis is occurring and the cells are doubling in numbers
  2. Implantation completes cleavage
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12
Q

What does term morula mean?

A

16 cells produced after 4 rounds of cell division

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13
Q

Name the parts of blastocyst at the time of implantation.

A
  • inner cell mass
  • blastocyst cavity
  • trophoblast
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14
Q

At what time after fertilization dose implantation begin?

A

6 days after fertilization

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15
Q

Gametogenesis is ___

A

part of meiosis

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16
Q

in oogenesis @ ovulation is the start of___

A

second meiotic devision

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17
Q

when ___ occurs the second meiotic division is completed.

A

fertilization

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18
Q

follicular cells protective layer.

A

corona radiata

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19
Q

Fertilization takes place 24 to 12-24 hours after ___

A

ovulation

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20
Q

1st cleavage completes about ___ after ___

A
  • 30-40 hrs

- fertilization

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21
Q

1st mitotic division yields 2___

A

blastomeres

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22
Q

Cell division resulting in smaller and smaller cells is termed

A

cleavage

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23
Q

____ begins 24 to 30 hours after fertilization

A

mitosis

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24
Q

4-5 days post fertilization fluid passes into the morula and is termed

A

blastocyst

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25
Q

trophoblast becomes the ___ and the fetal contribution to the placenta

A

chorion

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26
Q

inner cell mass becomes the ___

A

embryo, amnion, cord, and secondary yolk sac

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27
Q

in uterus, the blastocyst receives nutrients from ___

A

endometrial glands

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28
Q

___ completes the period of cleavage

A

implantation

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29
Q

during implantation trophoblast differentiates into 2 layers:

A
  1. cytotrophoblast

2. syncytiotrophoblase

30
Q

___ invades the endometrium to from lacunae spaces

A

syncytiotrophoblast

31
Q

outer multicelled layer of trophoblast with finger like projections

A

syncytiotrophoblase

32
Q

Single cell inner layer forms the chorion

A

cytotrophoblast

33
Q

T/F: implantation involves both endometrium & myometrium

A

FALSE- only endo

34
Q

Primary function is the production of hCG to extend the life of the corpus luteum

A

trophoblast

35
Q

Implantation that occurs where there is no endometrial lining is called

A

ectopic preg

36
Q

blastocyst inner cell mass epiblast form the

A

amnionic cavity which secretes fluid

37
Q

forms the primary umbilical vesicle aka primary yolk sac

A

hypoblast

38
Q

within the ___ fluid spaces form to create the chorionic cavity

A

extraembryonic coelom

39
Q

chorion surrounds the chorionic cavity and is made up of ___ and __ cells

A
  • mesoderm

- trophoblast

40
Q

also known as gestational sac

A

chorionic sac

41
Q

1st sonographic evidence of an intrauterine pregnancy

A

GESTATIONAL SAC

42
Q

umbilical vesicles produce ___ and nourish ___

A
  • first blood cells

- conceptus

43
Q

bilaminal embryonic disk has initially 2 layers ___ & ___

A

endoderm (inner) & ectoderm (outer)

44
Q

biliminar converts to triliminar by ____

A

gastrulation

45
Q

triliminar layers include

A
  • endoderm
  • mesoderm
  • ectoderm
46
Q

amnion is adjacent to the ___ (back of trilinimar disc)

A

ectoderm

47
Q

yolk sac is adjacent to the ___ (infront of triliminar disc)

A

endoderm

48
Q

T/F: all fetal tissues arise from grastulation triliminar layers

A

true

49
Q

when cells migrate from hypoblast to create mesoderm b/w endo and ectoderm

A

primitive streak

50
Q

endometrial layers

A
  • decidua capsularis
  • decidua parietalis
  • decidua basalis
51
Q

closes over and surrounds the burrowing blastocyst (developing embryo)

A

decidua capsularis

52
Q

lines the rest of the endometrial cavity which is not implanted by the blastocyst

A

decidua parietalis

53
Q

the area that the blastocyst attaches to the uterus and goes on to contribute to the maternal portion of the placenta

A

decidua basalis

54
Q

implantation of embryo

A
  1. blastocyst attach and imbed in decidua
  2. blastocyst is imbeded in deepest layer decidua basalis whwere trophoblast proliferate. capsularis surround the blastocyst and pareitalis is on opposite side of uterine cavity
  3. gestational sac grows, contour of decidua caps distorts uterine cav
55
Q

what creates the double decidual sign

A

decidual caps & pareitalis

56
Q

maternal blood supply to placenta via

A

villi

57
Q

blood drained from placenta via

A

endometrial vein

58
Q

placenta produces

A
  • chronic gonadotropin
  • estrogen
  • progesterone
59
Q

pregnancy test measure ___ levels

A

B-HCG

60
Q

B-HCG produced by ___ until 10 weeks then placenta takes over

A

syncytiotrophoblasts

61
Q

PRIMIGRAVIDA

A

pregnant for the first time

62
Q

term for organogenesis 6-10 weeks LMP

A

EMBRYO

63
Q

NULLIGRAVIDA

A

never been pregs

64
Q

connects yolk sac to embryonic midgut

A

VITELLINE DUCT

65
Q

1st trimester

A

LMP-13 weeks

66
Q

2nd trimester

A

14wk-27 wks

67
Q

3rd trimester

A

28 wk- term (40 weeks)

68
Q

NORMAL PREGNANCY = ___ WEEKS / ___ DAYS

A

40 WEEKS / 280 DAYS

69
Q

EDC

A

estimated date of confinement

70
Q

EDD

A

estimated date of delivery

IMG1004: OB-GYN (12 decks)

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