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Chapter 55: the placenta (practice test)

Terms in this set (25)

The fetal membranes are comprised of all of the following except the:
A) blastocyst
B) amnion
C) chorion
D) yolk sac
A) blastocyst
The chorionic plate is related to which one of the following?
A) fetal surface of the placenta
B) cotyledons and intervillous spaces
C) allantois of the yolk sac
D) maternal surface of the fetus
A) fetal surface of the placenta
The decidual reaction that changes in the endometrium opposite the site of implantation is which one of the following?
A) decidua capsularis
B) decidue basalis
C) decidua vera
D) decidua frondosum
C) decidua vera
The major functioning unit(s) of the placenta is(are) which of the following?
A) cotyledons
B) yolk sac
C) amnion
D) chorionic villi
D) chorionic villi
The placenta performs all of the following functions except:
A) protection
B) respiration
C) absorption
D) nutrition
C) absorption
The velementous placenta refers to a(n):
A) membranous insertion of the cord
B) insertion of the umbilical cord near the edge of the placenta
C) insertion of the umbilical cord at the margin of the placenta
D) arteriovenous anastomosis of the vessels within the placenta
A) membranous insertion of the cord
By 9 weeks, the yolk sac should measure _____ millimeters (mm) in diameter:
A) less than 5
B) greater than 2
C) less than 2
D) greater than 5
A) less than 5
Fusion of the amnion and chorion usually occurs by _______ weeks' gestation.
A) 20
B) 16
C) 12
D) 14
B) 16
The function of the human chorionic gonadotropin (hCG) is to perform which one of the following?
A) develop Wharton's jelly around the cord
B) produce amniotic fluid
C) stimulate the yolk sac development
D) maintain the corpus luteum in early pregnancy
D) maintain the corpus luteum in early pregnancy
A marginal or an eccentric insertion of the umbilical cord into the placenta is which one of the following?
A) placenta previa
B) battledore placenta
C) vasa previa
D) velamentous placenta
B) battledore placenta
The primary cause of placentomegaly is which one of the following abnormalities?
A) maternal diabetes
B) intrauterine infection
C) battledore placenta
D) intrauterine growth restriction (IUGR)
A) maternal diabetes
The most common site of fibrin deposition is which one of the following?
A) along the retroplacental area
B) within the hydatidiform mole
C) within the chorioangioma
D) along the subchorionic area
D) along the subchorionic area
Complications of placenta previa include all of the following except:
A) postpartum hemorrhage
B) succenturiate placenta
C) maternal hemorrhage
D) premature delivery
B) succenturiate placenta
Severe blood loss may occur with placenta ______.
A) increta
B) percreta
C) excreta
D) accreta
B) percreta
The presence of one or more accessory lobes connected to the body of the placenta by blood vessels is a ______ placenta.
A) circummarginate
B) succenturiate
C) circumvallate
D) battledore
B) succenturiate
Which one of the following statements about placental abruption is false?
A) bleeding in the decidua basalis occurs with separation
B) preterm labor may result
C) the bleed may lead to chorioangioma
D) placental abruption may be retroplacental or marginal abruption
C) the bleed may lead to chorioangioma
An example of low-pressure bleed is which one of the following?
A) decompression of the uterus
B) trauma to the uterus
C) marginal abruption
D) retroplacental abruption
C) marginal abruption
The maternal side of the placenta is decidua _______.
A) parietalis
B) capsularis
C) basalis
D) frondosum
C) basalis
The chorion around the gestational sac on the opposite side of implantation is chorion _______.
A) frondosum
B) vera
C) laeve
D) capsularis
C) laeve
A marginal placenta previa demonstrates which one of the following?
A) the edge of the placenta is near the internal cervical os
B) the placenta partially covers the internal cervical os
C) the placenta touches but does not cross the internal cervical os
D) the placenta is in the right lateral position
C) the placenta touches but does not cross the internal cervical os
Which one of the following abnormalities might demonstrate a small placenta?
A) aneuploidy
B) maternal anemia
C) Rh sensitivity
D) maternal diabetes
A) aneuploidy
Which one of the following occurs when the intramembranous vessels course across the internal cervical os?
A) battledore placenta
B) velamentous placenta
C) vasa previa
D) placenta previa
C) vasa previa
The growth of the chorionic villi superficially into the myometrium describes which one of the following?
A) placenta increta
B) succenturiate placenta
C) placenta accreta
D) placental migration
C) placenta accreta
The attachment of the placental membranes to the fetal surface of the placenta describes which one of the following?
A) battledore placenta
B) succenturiate placenta
C) placenta accreta
D) circummarginate placenta
D) circummarginate placenta
A circumscribed complex mass protruding from the fetal surface of the placenta is demonstrated on ultrasound. This appearance most likely represents which one of the following?
A) abruption placenta
B) circumvallate placenta
C) succenturiate placenta
D) chorioangioma
D) chorioangioma
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