Ultrasound
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Pathophysiology and Ultrasound of the Placenta Quiz

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1. The fetal membranes are comprised of all the following except:

chorion

amnion

blastocyst

yolk sac

2. The chorionic plate is related to:

the maternal surface of the fetus

the fetal portion developed from the chorion frondosum

the allantois of the yolk stalk

the cotelydons and intervillous spaces


3. The decidual reaction that changes in the endometrium opposite the site of implantation is:

decidua basalis

decidua capularis

decidua frondosum

decidua vera


4. The major functioning unit of the placenta is:

chorionic villus

yolk sac

amnion

cotelydons


5. The placenta performs all the following functions except:

protection

absorption

nutrition

respiration


6. The velamentous placenta refers to a:

insertion of the umbilical cord at the margin of the placenta

insertion of the umbilical cord near the edge of the placenta

arteriovenous anastomosis of the vessels within the placenta

membranous insertion of the cord


7. By nine weeks, the yolk sac should measure:

<5mm in diameter

>5mm in diameter

<2mm in diameter

>2mm in diameter


8. Fusion of the amnion and chorion should occur by:

12 weeks gestation

14 weeks gestation

16 weeks gestation

20 weeks gestation


9. The function of the hCG is to:

produce amniotic fluid

maintain the corpus luteum in early pregnancy

develop Whaton's Jelly around the cord

stimulate the yolk sac development


10. If a single umbilical artery is seen, the sonographer should search for:

neural tube defect

esophageal atresia

genitourinary defect

abdominal wall defects


11. The primary causes for placentomegaly are:

IUGR

fetal demise

maternal diabetes

cardiovascular disease


12. The most common site of fibrin deposition is:

along the subchorionic area

along the retroplacental area

within the chorioangioma

within the hydatidiform mole


13. Complications of placenta previa include all except:

premature delivery

maternal hemorrhage

post-partum hemorrhage

succenturiate placenta


14. The most dangerous type of placenta accreta is:

percreta

increta

accreta

eccreta


15. The presence of one or more accessory lobes connected to the body of the placenta by blood vessels is:

circumvallate placenta

succenturiate placenta

circummarginate placenta

battledore placenta


16. Which of the following statements is false regarding a placental abruption:

bleeding in the decidua basalis occurs with separation

it may be retroplacental or marginal

the bleed may lead to a chorioangioma

pre-term labor may result


17. An example of a low-pressure bleed is:

marginal abruption

retroplacental abruption

decompression of the uterus

trauma to the uterus


18. Of all the different types of placenta bleeds, the most dangerous to the fetus is:

placenta infarct

intervillous thrombosis

marginal abruption

retroplacental abruption


19.The most common clinical sign present in a molar pregnancy is:

hyperemesis

decreased hCG

uterus smaller than dates

polycystic ovarian disease


20 . A benign proliferation of fetal vessels is representative of:

intervillous thrombosis

incomplete molar pregnancy

cotelydon necrosis

chorioangioma