conception and fetal development part 2

Question 1

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

Answer 1

ovum

Question 2

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

Answer 2

endometrium

Question 3

the fetal part of the placenta is inside the ___ _____

Answer 3

amniotic fluid

Question 4

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

Answer 4

3rd

Question 5

maternal portion of placenta consists of _____ ____ and its circulation

Answer 5

decidua basalis

Question 6

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

Answer 6

chorionic villi

Question 7

the placenta produces _____, _____, and ____ _____

Answer 7

glycogen
cholesterol
fatty acids

Question 8

the placenta helps with fetal ____, ____, and ______

Answer 8

respirations
nutrition
excretion

Question 9

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

Answer 9

7th

Question 10

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

Answer 10

progesterone

Question 11

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

Answer 11

250

Question 12

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

Answer 12

progesterone

Question 13

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

Answer 13

progesterone
estrogen

Question 14

at a newborns first breath, the _____ ____opens

Answer 14

ductus arteriosus

Question 15

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

Answer 15

murmur

Question 16

the _____ ____ closes when the infant breaths

Answer 16

foramen ovale

Question 17

____ ____ constricts as arterial O2 rises

Answer 17

ductus arteriosus

Question 18

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

Answer 18

ductus venosus

Question 19

outer germ layer secretes ______

Answer 19

fluid

Question 20

the outer germ layer, becomes the ____ and its membranes

Answer 20

placenta

Question 21

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

Answer 21

embryonic disk

Question 22

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

Answer 22

trophoblast

Question 23

amniotic cavity lined with _____ cells

Answer 23

ectoderm

Question 24

yolk sak lined with ______ cells

Answer 24

endoderm

Question 25

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

Answer 25

4

Question 26

main external features of fetus develop by the _____ week

Answer 26

8th

Question 27

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

Answer 27

somites

Question 28

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

Answer 28

atrium

Question 29

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

Answer 29

arm leg

Question 30

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

Answer 30

5

Question 31

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

Answer 31

cranial nerves

Question 32

at 6 weeks, the ____ has developed

Answer 32

trachea

Question 33

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

Answer 33

caudal

Question 34

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

Answer 34

bifurcated

Question 35

at ____ weeks both arms and legs have digits

Answer 35

6

Question 36

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

Answer 36

heart

Question 37

at ___ weeks fetal circulation begins to be established

Answer 37

6

Question 38

at 6 weeks, the _____ starts to produce blood cells

Answer 38

liver

Question 39

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

Answer 39

8

Question 40

at _____ weeks tooth buds appear

Answer 40

12

Question 41

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

Answer 41

12

Question 42

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

Answer 42

urogenital kidneys

Question 43

at 12 weeks, _____ are produced primarily by the liver

Answer 43

RBCs

Question 44

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

Answer 44

12

Question 45

weeks ___-____ are periods of rapid growth

Answer 45

13-16

Question 46

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

Answer 46

lanugo

Question 47

_____ ___ babies have more lanugo

Answer 47

pre-term

Question 48

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

Answer 48

stretches sucks and swallows

Question 49

at 13-16 weeks, the fetus produces _____

Answer 49

meconium

Question 50

the mother will be able to feel quickening at _____ weeks

Answer 50

18

Question 51

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

Answer 51

forward higher

Question 52

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

Answer 52

subcutaneous deposits

Question 53

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

Answer 53

eyes

Question 54

____ and ____ reflexes present at 24 weeks

Answer 54

grasp startle

Question 55

____ _____ is a cheesy substance that helps protect babies skin

Answer 55

vernix caseosa

Question 56

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

Answer 56

vernix caseosa

Question 57

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

Answer 57

alveoli

Question 58

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

Answer 58

36

Question 59

at 24 weeks, the lungs begin to produce _____

Answer 59

surfactant

Question 60

at 28 weeks, the _____ is developing rapidly

Answer 60

brain

Question 61

at 30 weeks, the ____ ___ reflex is present

Answer 61

papillary light

Question 62

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

Answer 62

rhythmic breathing body temp

Question 63

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

Answer 63

soft flexible

Question 64

at 36 weeks, ____ begins to disappear

Answer 64

lanugo

Question 65

____ weeks is considered full-term

Answer 65

38

Question 66

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

Answer 66

pink smooth

Question 67

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

Answer 67

upper arms shoulders

Question 68

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

Answer 68

head

Question 69

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

Answer 69

extremities head

Question 70

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

Answer 70

folic acid

Question 71

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

Answer 71

neural tube