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L10_ Fetal membranes _ Embryology

 Lecture video part1


Lecture video part2



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Questions 

1/Concerning the amnion,all are except one:
a-It starts its formation 8th day after fertilization
b-The amnioblasts develop from ectoderm
c-The amnion surround the embryo after folding
d-The amnion covers the fetal surface of pplacent


2/The followings are characters of amniotic fluid except:
a-It is a clear watery fluid
b-It contains a trace of glucose,amino acids
c-At the time of birth,it is about more than 2 liters d-It passes through the placenta
e-The amniotic fluid washes the vagina during the labor


3/Concerning the functions of amnion, all are true except one:
a-It protect the embryo from external
b-it permits the free fetal movements pressure
c-It is the site of formation of blood cells and blood vessels
d-It helps the fetus to learn the suckling
e-It helps the dilatation of cervix during the labor


4/The primordial germ cells are derived from:
a-Amniotic membrane
b-Yolk sac
c-Ectoderm
d-Intraembyonic mesoderm
e-Extraembryonic mesoderm


5/The followings are the functions of yolk sac except:
a-It contains the yolk for nutrition of embryo before formation of placenta
b-It forms the intestinal tract and respiratory system
c-It share in the formation of urinary bladder
d-it is the site of formation of blood cells
e-It is the site of formation of primordial germ cells
e-The placental septa occupies the groove between the cotyledone


6/ internal structure of placenta includes the following except:
A-Chorionic plate
b-Chorionic villi
c-Intervillus space
d-Wharton’s jelly
e-Cytotrophoblastic shell


7/Concerning the placental septa,one is incorrect:
a-They are developed from the decidua basalis
b-They projects into the intervillus space
c- reach the chorionic plate
d-It is covered by cytotrophoblast and cyncytiotrophoblast


8/The battledore placenta means:
a-The umbilical cord is separated from the margin of placenta by distance
b-The umbilical cord is attached to the margin of placenta
c-Accessory placenta
d-The placenta consist of two lobes
e-The placenta is abnormally fixed to the myometrium


9/Very long umbilical cord may leads to:
a-Premature separation of placenta
b-Asphyxia
c-Antepartum hemorrhage
d-Postpartum hemorrhage
e-Congenital anomalies


10/The umbilical cord contains:
a-One artery and one vein
b-Two arteries and two veins
c-One artery and two veins
d-Two arteries and one vein
e-Only one artery


11/monozygotic twins as a result of splitting of 2-cell stage, the fetal Membranes are:
a-One placenta, one chorion and one amnion chorion and one
b-One placenta, two amnion
c-One placenta, one chorion and two amnion
d-Two placenta, two chorion and two amnion
e-Two placenta, two chorion and one amnion


12/Concerning the dizygotic twins,one is correct:
a-Occurs by splitting of zygote
b-Of the same shape
c-Of the same behavior
d-Of the same sex or different sex
e-Have one placenta,one chorion and one amnion


13/The conjoined twins may be fused in the region of:
a-Head
b-Trunk
C-Pelvis
d-All of the above
e-a+b only

Answers

1-b
2-d
3-c
4-b
5-a
6-d
7-c
8-b
9-b
10-d
11-d
12-d
13-d


























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