Human PlacentaEmbryology Lab

Placenta, Fetal Membranes & Twinning Embryology MCQs: mixed practice questions

Try 4 sample questions drawn from across Placenta, Fetal Membranes & Twinning. Tap an answer to check it.

1. What is the key developmental event producing monozygotic twins?

   From: Multiple Gestation & Twins
   A. Fertilization of one oocyte by two spermB. Fusion of two zygotesC. Division of one embryonic conceptus into twoD. Fusion of two placentasE. Separation of the decidua

2. How many large chorionic fetal blood vessels are visible on the fetal placental surface?

   From: Placenta Development
   A. 10–15B. 5–8C. 1–2D. 2–3E. 20–25

3. Which waste gas moves from fetal to maternal blood?

   From: Placental Circulation & Exchange
   A. Nitric oxideB. Carbon monoxideC. NitrogenD. Carbon dioxideE. Oxygen

4. How are the intestines covered in gastroschisis?

   From: Umbilical Cord & Fetal Membranes
   A. They are not covered by a membraneB. They are covered by peritoneumC. They are covered by amnionD. They are covered by a thick fibrous sacE. They are covered by chorion