Deck 6: Placenta and Fetal Membranes

Question 1

________ Extends into cervical canal during labor

A)Separate placentas and membranes
B)Fibrinoid material
C)Amniochorionic membrane
D)Monochorionic placenta
E)Syncytial knot

Answer 1

C
The chorion,with which the amnion is fused,extends into the cervical canal during the first stage of labor and helps to dilate the cervix.When the fused layers of amnion and chorion (amniochorionic membrane)rupture,the amniotic fluid escapes through the cervix and vagina.

Question 2

________ Ensheaths umbilical cord

A)A
B)B
C)C
D)D
E)E

Answer 2

D
As the amniotic sac enlarges,it obliterates the chorionic cavity and ensheaths the umbilical cord.The amnion becomes the epithelial covering of the cord.

Question 3

________ Features of maternal surface of placenta

A)Anchoring villi
B)Cytotrophoblast
C)Amnion
D)Battledore placenta
E)Cotyledons

Answer 3

E
Cotyledons are characteristic features of the maternal surface of the placenta.The placental septa divide the maternal surface into 15 to 30 cotyledons,which gives the expelled placenta a cobblestone appearance.During examination of the placenta after delivery,special attention should be given to determining whether the cotyledons are all present and intact.If they are not all recognizable and complete,placental tissue may still be in the uterus and must be removed.

Question 4

________ Smooth chorion

A)A
B)B
C)C
D)D
E)E

Question 5

________ Decidua parietalis

A)A
B)B
C)C
D)D
E)E

Question 6

________ Decidua capsularis

A)A
B)B
C)C
D)D
E)E

Question 7

________ Marginal attachment of umbilical cord

A)Anchoring villi
B)Cytotrophoblast
C)Amnion
D)Battledore placenta
E)Cotyledons

Question 8

________ Branch villus

A)A
B)B
C)C
D)D
E)E

Question 9

________ Places of attachment to decidua basalis

A)Anchoring villi
B)Cytotrophoblast
C)Amnion
D)Battledore placenta
E)Cotyledons

Question 10

________ Maternal part of placenta

A)A
B)B
C)C
D)D
E)E

Question 11

________ Fetal capillary

A)A
B)B
C)C
D)D
E)E

Question 12

________ Nuclear aggregation

A)Separate placentas and membranes
B)Fibrinoid material
C)Amniochorionic membrane
D)Monochorionic placenta
E)Syncytial knot

Question 13

________ Forms on the surfaces of chorionic villi

A)Separate placentas and membranes
B)Fibrinoid material
C)Amniochorionic membrane
D)Monochorionic placenta
E)Syncytial knot

Question 14

________ Fetal surface of placenta

A)Anchoring villi
B)Cytotrophoblast
C)Amnion
D)Battledore placenta
E)Cotyledons

Question 15

________ Fetal capillaries

A)A
B)B
C)C
D)D
E)E

Question 16

________ Placental membrane

A)A
B)B
C)C
D)D
E)E

Question 17

________ Forms part of early placental membrane

A)Anchoring villi
B)Cytotrophoblast
C)Amnion
D)Battledore placenta
E)Cotyledons

Question 18

________ Occurs only in monozygotic twins

A)Separate placentas and membranes
B)Fibrinoid material
C)Amniochorionic membrane
D)Monochorionic placenta
E)Syncytial knot

Question 19

________ Fibrinoid material

A)A
B)B
C)C
D)D
E)E

Question 20

________ Syncytial knot

A)A
B)B
C)C
D)D
E)E

Question 21

________ Arteriocapillary venous network

A)A
B)B
C)C
D)D
E)E

Question 22

________ Syncytiotrophoblast

A)A
B)B
C)C
D)D
E)E

Question 23

________ Umbilical arteries

A)A
B)B
C)C
D)D
E)E