Chapter 56 The Placenta 2025/2026 – Detailed Notes, Review & Study Guide

Chapter 56 the placenta
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1. The fetal membranes are comprised of all of the fol- A) blastocyst
lowing except the:
A) blastocyst
B) amnion
C) chorion
D) yolk sac

2. The chorionic plate is related to which one of the fol- A) fetal surface of the pla-
lowing? centa
A) fetal surface of the placenta
B) cotyledons and intervillous spaces
C) allantois of the yolk sac
D) maternal surface of the fetus

3. The decidual reaction that changes in the endometri- C) decidua vera
um opposite the site of implantation is which one of
the following?
A) decidua capsularis
B) decidue basalis
C) decidua vera
D) decidua frondosum

4. The major functioning unit(s) of the placenta is(are) D) chorionic villi
which of the following?
A) cotyledons
B) yolk sac
C) amnion
D) chorionic villi

5. The placenta performs all of the following functions C) absorption
except:
A) protection

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, Chapter 56 the placenta
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B) respiration
C) absorption
D) nutrition

6. The velementous placenta refers to a(n): A) membranous insertion
A) membranous insertion of the cord 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

7. By 9 weeks, the yolk sac should measure _____ millime- A) less than 5
ters (mm) in diameter:
A) less than 5
B) greater than 2
C) less than 2
D) greater than 5

8. Fusion of the amnion and chorion usually occurs by B) 16
_______ weeks' gestation.
A) 20
B) 16
C) 12
D) 14

9. The function of the human chorionic gonadotropin D) maintain the corpus lu-
(hCG) is to perform which one of the following? teum in early pregnancy
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
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