Histology MCQs/Placenta and fetal membranes



{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
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{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
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{All but one hormones are produced by the placenta? Which one does not? - Chorionic gonadotropin + Triiodthyronine - Progesteron - Estrogens
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{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
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{Where takes place the amniotic fluid? - In the abdominal cavity of the fetus - In the intervillous space + In the amniotic cavity - In the chorion
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{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
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{Which blood takes place inside the intervillous spaces? - Mixed maternal and fetal blood + Maternal blood - Fetal blood - There is no blood here
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{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
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{Which compound can not pass the placental barrier? + Hemoglobin - Aminoacids - Glucose - Water
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{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
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{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
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{Which pathological condition can be caused by Rh incompatibitily - Twin-to-twin transfusion + Fetal erythroblastosis - Placenta percretta - Umbilical knots
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{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
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{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
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 * Exceptionally, fusion of two blastocyst can give rise to monochorionic diamniotic twins

{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
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{How long is usually the umbilical cord before the birth? - About 20 cm - About 30 cm - About 40 cm + About 50 cm
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{How is called the stage of the labor in which the placenta is expelled? - Second stage + Third stage - Fourth staga - It has no name
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{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
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{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
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{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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