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ob exam 1 > conception and fetal development part 2 > Flashcards

conception and fetal development part 2 Flashcards

1
Q

identical (monozygotic) twins develop from a single _____ that divides and forms 2 developing cellular masses

A

ovum

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2
Q

maternal part of placenta is on the ______ attached to the mother

A

endometrium

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3
Q

the fetal part of the placenta is inside the ___ _____

A

amniotic fluid

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4
Q

development of placenta and circulation does not begin until the _____ week of embryonic development

A

3rd

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5
Q

maternal portion of placenta consists of _____ ____ and its circulation

A

decidua basalis

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6
Q

the fetal portion of the placenta consists of the ___ _____ and their circulation

A

chorionic villi

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7
Q

the placenta produces _____, _____, and ____ _____

A

glycogen
cholesterol
fatty acids

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8
Q

the placenta helps with fetal ____, ____, and ______

A

respirations
nutrition
excretion

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9
Q

in the ____ week of development, the placenta produces more than 50% of estrogens in maternal circulation

A

7th

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10
Q

in the 10th week, the placenta takes over production of _______ from corpus luteum

A

progesterone

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11
Q

in the 10th week, the corpus luteum secretes progesterone in large quantities, reaching levels of more than _____mg/day late in pregnancy

A

250

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12
Q

if a pt has a miscarriage, _____ levels will go down

A

progesterone

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13
Q

in the 11th week, the placenta produces enough _____ and _____ to maintain pregnancy

A

progesterone
estrogen

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14
Q

at a newborns first breath, the _____ ____opens

A

ductus arteriosus

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15
Q

if the foramen ovale isn’t closing properly, a ____ may be suspected

A

murmur

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16
Q

the _____ ____ closes when the infant breaths

A

foramen ovale

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17
Q

____ ____ constricts as arterial O2 rises

A

ductus arteriosus

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18
Q

_____ ____ constricts when the flow of blood from the umbilical cord stops

A

ductus venosus

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19
Q

outer germ layer secretes ______

A

fluid

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20
Q

the outer germ layer, becomes the ____ and its membranes

A

placenta

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21
Q

during germ layer development, the fetus forms from the _____ _______

A

embryonic disk

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22
Q

during germ layer development, _____ is responsible for embedding in the uterus

A

trophoblast

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23
Q

amniotic cavity lined with _____ cells

A

ectoderm

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24
Q

yolk sak lined with ______ cells

A

endoderm

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25
Q

during week ____ of fetal development, the heart begins the beat

A

4

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26
Q

main external features of fetus develop by the _____ week

A

8th

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27
Q

during weeks 4 and 5, _____ form on either side of the embryos midline that will form the spinal column

A

somites

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28
Q

during weeks 4 and 5, partitioning in heart occurs with dividing of ______

A

atrium

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29
Q

during weeks 4 and 5, _____ and _____ buds are well developed

A

arm
leg

30
Q

during weeks 4 and 5, the brain has ___ differentiated areas

A

5

31
Q

during weeks 4 and 5, 10 pairs of ____ ____ are recognizable

A

cranial nerves

32
Q

at 6 weeks, the ____ has developed

A

trachea

33
Q

at 6 weeks, the trachea’s ____ end is bifurcated for the beginning of lung formation

A

caudal

34
Q

at 6 weeks, the trachea’s caudal end is ____ for the beginning of lung formation

A

bifurcated

35
Q

at ____ weeks both arms and legs have digits

A

6

36
Q

at 6 weeks, the fetal ____ has most of its definitive characteristics

A

heart

37
Q

at ___ weeks fetal circulation begins to be established

A

6

38
Q

at 6 weeks, the _____ starts to produce blood cells

A

liver

39
Q

at ____ weeks, every organ system and external structure that will be found in full-term newborn is present

A

8

40
Q

at _____ weeks tooth buds appear

A

12

41
Q

at ____ weeks the fetus can curl fingers toward their palm and will have spontaneous movements

A

12

42
Q

at 12 weeks, _____ tract completes its development and _____ begin to produce urine

A

urogenital
kidneys

43
Q

at 12 weeks, _____ are produced primarily by the liver

A

RBCs

44
Q

fetal heart begins to beat at 4 weeks, but cannot be heard until ___ weeks

A

12

45
Q

weeks ___-____ are periods of rapid growth

A

13-16

46
Q

at 13-16 weeks, ____ begins to develop, especially on the head

A

lanugo

47
Q

_____ ___ babies have more lanugo

A

pre-term

48
Q

at 13-16 weeks, the fetus _____, and ____ and _______ amniotic fluid

A

stretches
sucks and swallows

49
Q

at 13-16 weeks, the fetus produces _____

A

meconium

50
Q

the mother will be able to feel quickening at _____ weeks

A

18

51
Q

at 18 weeks, the eyes and face are ___ and the ears are ______

A

forward
higher

52
Q

at 20 weeks, ______ ______ of brown fat make skin less transparent

A

subcutaneous deposits

53
Q

at 24 weeks, the ____ are structurally complete and will soon open

A

eyes

54
Q

____ and ____ reflexes present at 24 weeks

A

grasp
startle

55
Q

____ _____ is a cheesy substance that helps protect babies skin

A

vernix caseosa

56
Q

at 24 weeks, the fetus’ entire body is covered with _____ _____

A

vernix caseosa

57
Q

at 24 weeks the _____ in the lungs are just beginning to form

A

alveoli

58
Q

at ____ weeks a has a good chance of surviving if born

A

36

59
Q

at 24 weeks, the lungs begin to produce _____

A

surfactant

60
Q

at 28 weeks, the _____ is developing rapidly

A

brain

61
Q

at 30 weeks, the ____ ___ reflex is present

A

papillary light

62
Q

at 30 weeks, the CNS has matured enough to direct _____ _____ movements and partially control _____ _____

A

rhythmic breathing
body temp

63
Q

at 30 weeks, bones are fully developed, but are _____ and ______

A

soft
flexible

64
Q

at 36 weeks, ____ begins to disappear

A

lanugo

65
Q

____ weeks is considered full-term

A

38

66
Q

at 38-40 weeks, the skin is ______ and has ____, polished look

A

pink
smooth

67
Q

at 38-40 weeks lanugo is only on ____ _____ and ________

A

upper arms
shoulders

68
Q

at term, the fetus assumes a position of comfort, usually _____ down

A

head

69
Q

at term, the fetus has well-flexed ____ and _____

A

extremities
head

70
Q

deficiency of ____ ____ prenatally can increase the incidence of neural tube defects

A

folic acid

71
Q

deficiency of folic acid prenatally can increase the incidence of _____ _____ defects

A

neural tube

ob exam 1 (5 decks)

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