Histology MCQs/Placenta and fetal membranes

Placenta and umbilical cord.

1 Which of following statemenst about dizygotic twins is true?

	Birth weight of this twin is about one half of normal birth weight
	Each twin has its own amniotic cavity
	They originate from one oocyte
	They have the same sex

2 Which pathological condition is called placenta increta?

	Placenta is inserted too low, it covers the cervical channel
	Placenta is full of blood clots (trombi), its function drops
	Placenta is splitted to two or more separated lobes
	Placentar villi growth into the myometrium

3 All but one hormones are produced by the placenta? Which one does not?

	Chorionic gonadotropin
	Triiodthyronine
	Progesteron
	Estrogens

4 Which statement about the blood flowing in the umbilical vein is true?

	The blood is maternal oxygenated
	The blood is fetal oxygenated
	The blood is maternal with low level of oxygen
	The blood is fetal with low level of oxygen

5 Where takes place the amniotic fluid?

	In the abdominal cavity of the fetus
	In the intervillous space
	In the amniotic cavity
	In the chorion

6 Which statement about the syncytiotrophoblast is true?

	It covers the chorionic villi
	It covers the chorionic plate
	It covers both chorioic villi and plate
	It disappears before formation of the placenta is completed

7 Which blood takes place inside the intervillous spaces?

	Mixed maternal and fetal blood
	Maternal blood
	Fetal blood
	There is no blood here

8 Which statement about the decidua basalis is true?

	It does not contain markable deposits of glycogen
	It gives rise maternal part of the placenta
	It covers whole uterine cavity
	It contains no vessel

9 Which compound can not pass the placental barrier?

	Hemoglobin
	Aminoacids
	Glucose
	Water

10 Which structure holds maternal and fetal parts of the placenta together?

	Pressuere of surrounging anatomical structures
	Ligaments on the border of the placenta
	Ligament in the center of the placenta
	Anchoring villi

11 Which structures form the placental barrier?

	Fetal capillaries, syncytiotrophoblast, maternal capillaries
	Fetal capillaries, cytotrophoblast, syncytiotrophoblast
	Chorionic membrane and maternal capillaries
	Chorionic membrane and fetal capillaries

12 Which pathological condition can be caused by Rh incompatibitily

	Twin-to-twin transfusion
	Fetal erythroblastosis
	Placenta percretta
	Umbilical knots

13 Do IgG antibodies pass the placental barrier?

	Yes, they do
	Yes, they do, but at the beginning of the pregnancy only
	Yes, they do, but few days before the birth only
	No, they do not

14 Which statement about monochorionic twins is true?

	In almost all cases, the twins are monozygotic
	In all cases, twins share the amniotic cavity
	In majority of cases, each twin has its own placenta
	In all cases, shared placenta is excluded

15 How big is usually the placenta before the birth?

	About 12 cm in diameter and 2-2.5 cm in thickness
	About 12 cm in diameter and 5-5.5 cm in thickness
	About 22 cm in diameter and 2-2.5 cm in thickness
	About 22 cm in diameter and 5-5.5 cm in thickness

16 How long is usually the umbilical cord before the birth?

	About 20 cm
	About 30 cm
	About 40 cm
	About 50 cm

17 How is called the stage of the labor in which the placenta is expelled?

	Second stage
	Third stage
	Fourth staga
	It has no name

18 In which direction are transported urea and uric acid through the placenta? note: both these compounds are common waste products of the metabolism

	From the fetal blood to the maternal blood
	Form the maternal blood to the fetal blood
	They can not pass the placental barrier

19 In which directin are transported phenylalanine or leucine throught the placenta?

	From the fetal blood to the maternal blood
	Form the maternal blood to the fetal blood
	They can not pass the placental barrier

20 Can viruses pass the placental barrier?

	Yes, all viruses can easily pass the barrier
	Yes, some viruses can pass the barrier
	No, viruses can not pass the barrier

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