lect 16 and 17- placenta and fetus

Question 1

what is the decidua basalts between

Answer 1

blastocyst and myometrium

Question 2

what is the cap of the implantation site

Answer 2

decidua capsularis

Question 3

what is the maternal blood color

Answer 3

dull red

Question 4

what gives the placenta its shaggy look

Answer 4

remnants of decidua basalts

Question 5

what is the fetal part of the placenta

Answer 5

villous chorion

Question 6

what is the primary stage of formation of the villous chorion

Answer 6

projection of trophoblast

Question 7

what is the secondary stage of formation of the villous chorion

Answer 7

mesoderm core

Question 8

what is the tertiary stage of formation of the villous chorion

Answer 8

formation of capillaries in villus

Question 9

when is the capillary system of the placenta membrane established

Answer 9

when the heart begins to beat

Question 10

what separates the lateral and fetal blood

Answer 10

hemochorial placenta

Question 11

what erodes the spiral arteries

Answer 11

cytotrophoblast

Question 12

describe the maternal placental circulation

Answer 12

spiral arteries to intervillous spaces to uterine veins

Question 13

describe fetal placental circulation

Answer 13

1 umbilical vein picks of oxygenated blood and returns via 2 umbilical arteries to chorionic umbilical arteries to chorionic arteries to capillary beds in villi

Question 14

what occurs when the placenta covers the internal os

Answer 14

placenta previa

Question 15

what occurs when the placenta grows through the endometrium to the myometrium

Answer 15

placenta accreta

Question 16

what occurs when the placenta grows into the myometrium

Answer 16

placenta increta

Question 17

what occurs when the placenta grows into the perimetrium

Answer 17

placenta percreta

Question 18

what occurs when the placenta separates partially or totally from uterine wall

Answer 18

placenta abruptio

Question 19

what occurs when one twin compresses the second twin against the uterus

Answer 19

fetus papyraceus

Question 20

what do conjoined twins share

Answer 20

amnion, chorion and placenta

Question 21

what is stage one of parturition

Answer 21

effacement and dilation of the cervix

Question 22

what is stage 2 of parturition

Answer 22

delivery of the fetus

Question 23

what is stage 3 of parturition

Answer 23

delivery of the placenta and fetal membranes

Question 24

describe the growth of fetal length

Answer 24

increases linearly

Question 25

what ultrasound measurement is used to help determine size and probability of age in a fetus

Answer 25

crown rump length

Question 26

how long are external genitalia similar between males and females

Answer 26

until end of week 9

Question 27

when do the external genitalia of fetuses real mature form

Answer 27

week 12

Question 28

when are intestinal coils visible in the proximal end of the umbilical cord

Answer 28

until middle of week 10

Question 29

when do intestines return to the abdomen

Answer 29

by the end of week 10

Question 30

what is the major site of erythropoiesis at week 9

Answer 30

liver

Question 31

what is the main erythropoietic organ at week 12

Answer 31

spleen

Question 32

when does urine formation begin

Answer 32

between week 9 and 12

Question 33

when does limb movement become coordinated

Answer 33

week 14

Question 34

what is the skin of the fetus covered in weeks 17 to 20

Answer 34

vernix caseosa

Question 35

what is the mixture of dead epidermal cells and secretion from sebaceous glands

Answer 35

vernix caseosa

Question 36

when are eyebrows and hair visible

Answer 36

at 20 weeks

Question 37

when does surfactant production begin

Answer 37

week 24

Question 38

when do eyelids open

Answer 38

week 26

Question 39

when are toenails visible

Answer 39

week 26-29

Question 40

when is the pupillary light reflex present

Answer 40

30 weeks

Question 41

what are some conditions that decrease uterine blood flow

Answer 41

small chorionic vessels, severe hypotension/hypertension, renal disease, decrease maternal placental circulation

Question 42

when do taste buds and swallowing appear

Answer 42

taste buds at week 7; swallowing week 10

Question 43

what is the fetal component of the placenta derived from

Answer 43

trophoblast and extra embryonic mesoderm

Question 44

what is the maternal component of the placenta derived from

Answer 44

uterine endometrium

Question 45

what membrane ruptures during labor (water breaking)

Answer 45

amniochorionic membrane

Question 46

what is the placenta bordered by on the fetal side

Answer 46

chorionic plate

Question 47

what is the placenta bordered by on the maternal side

Answer 47

decidua basalis

Question 48

when does splitting of the zygote in monozygotic twins typically occur

Answer 48

at the early blastocyst stage

Question 49

what is he major growth promoting factor during development before and after birth

Answer 49

IGF-1

Question 50

what condition is characterized by maternal hypertension and proteinuria due to reduced organ perfusion

Answer 50

preeclampsia

Question 51

what occurs when anemia becomes so severe that edema and effusions into the body cavities occurs, leading to fetal death

Answer 51

fetal hydrops