Block 7 Placenta Amniotic BRS W Xpl
- 1.During the later stages of pregnancy, maternal blood is separated from fetal blood by
- A.
Syncytiotrophoblast only
- B.
Cytotrophoblast only
- C.
Syncytiotrophoblast and cytotrophoblast
- D.
Syncytiotrophoblast and fetal endothelium
- E.
Cytotrophoblast and fetal endothelium
- 2.The maternal and fetal components of the placenta are
- A.
Decidua basalis and secondary chorionic villi
- B.
Decidua capsularis and secondary chorionic villi
- C.
Decidua parietalis and tertiary chorionic villi
- D.
Decidua capsularis and villous chorion
- E.
Decidua basalis and villous chorion
- 3.The intervillous space of the placenta contains
- A.
Maternal blood
- B.
Fetal blood
- C.
Maternal and fetal blood
- D.
Amniotic fluid
- E.
Maternal blood and amniotic fluid
- 4.A young insulin-dependent diabetic woman in her first pregnancy is concerned that her daily injection of insulin will cause a congenital malformation in her baby. What should the physician tell her?
- A.
Insulin is highly teratogenic; discontinue treatment
- B.
Insulin does not cross the placental membrane
- C.
Insulin crosses the placental membrane but is degraded rapidly
- D.
Insulin will benefit her baby by increasing glucose metabolism
- E.
Insulin crosses the placental membrane but is not teratogenic
- 5.What is a normal amount of amniotic fluid at term?
- A.
50 mL
- B.
500 mL
- C.
1000 mL
- D.
1500 mL
- E.
2000 mL
- 6.Which of the following does not pass through the primitive umbilical ring?
- A.
Allantois
- B.
Amnion
- C.
Yolk sac
- D.
Connecting stalk
- E.
Space connecting the intraembryonic and extraembryonic coeloms
- 7.Which of the following best describes the placental components of dizygotic twins?
- A.
One placenta, two amniotic sacs, one chorion
- B.
One placenta, two amniotic sacs, two chorions
- C.
Two placentas, two amniotic sacs, one chorion
- D.
Two placentas, two amniotic sacs, two chorions
- E.
One placenta, two amniotic sacs, two chorions
- 8.A 26-year-old pregnant woman experiences repeated episodes of bright red vaginal bleeding at week 28, week 32, and week 34 of pregnancy. The bleeding spontaneously subsided each time. Using ultrasound, the placenta is located in the lower right portion of the uterus over the internal os. What is the diagnosis?
- A.
Hydatidiform mole
- B.
Vasa previa
- C.
Placenta previa
- D.
Placental abruption
- E.
Premature rupture of the amniochorionic membrane
- 9.A 19-year-old woman in week 32 of a complication-free pregnancy is rushed to the emergency department because of profuse vaginal bleeding. The bleeding subsides, but afterwards no fetal heart sounds can be heard, indicating intrauterine fetal death. The woman goes into labor and delivers a stillborn infant. On examination of the afterbirth, a velamentous placenta is detected. Although not much can be done at this point, what is the diagnosis?
- A.
Placenta previa
- B.
Vasa previa
- C.
Hydatidiform mole
- D.
Premature rupture of the amniochorionic membrane
- E.
Amniotic band syndrome
- 10.Human chorionic gonadotropin (hCG) is produced by which of the following?
- A.
Ectoderm
- B.
Cytotrophoblast
- C.
Decidua basalis
- D.
Syncytiotrophoblast
- E.
Mesoderm
- 11.A reliable index of fetal-placenta function is maternal urinary levels of
- A.
Estrone
- B.
Human placental lactogen (hPL)
- C.
Prolactin (PRL)
- D.
Progesterone
- E.
Estriol
- 12.The Doppler fetal heart rate is first audible in which of the following trimesters?
- A.
First trimester
- B.
Second trimester
- C.
Third trimester
- 13.The lungs become capable of respiration in which of the following trimesters?
- A.
First trimester
- B.
Second trimester
- C.
Third trimester
- 14.Leber hereditary optic neuropathy demonstrates which of the following inheritance patterns?
- A.
Mitochondrial inheritance
- B.
X-linked recessive
- C.
Autosomal dominant
- D.
Autosomal recessive
- 15.Duchenne muscular dystrophy demonstrates which of the following inheritance patterns?
- A.
Mitochondrial inheritance
- B.
X-linked recessive
- C.
Autosomal dominant
- D.
Autosomal recessive
- 16.Huntington disease demonstrates which of the following inheritance patterns?
- A.
Mitochondrial inheritance
- B.
X-linked recessive
- C.
Autosomal dominant
- D.
Autosomal recessive
- 17.Which of the following is inherited entirely through maternal transmission?
- A.
Huntington disease
- B.
Cystic fibrosis
- C.
Duchenne muscular dystrophy
- D.
Leber hereditary optic neuropathy
- 18.Which of the following genetic diseases involves a mutation in a Cl- channel?
- A.
Huntington disease
- B.
Cystic fibrosis
- C.
Duchenne muscular dystrophy
- D.
Leber hereditary optic neuropathy
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