COBGC Anatomy and Physiology 3

Question 1

The placenta is derived primarily from which fetal tissue?

Accepted Answer

Trophoblast (chorion)

Answer

The trophoblastic cells of the early embryo differentiate into cytotrophoblast and syncytiotrophoblast, which form the fetal portion of the placenta.

Question 2

Human chorionic gonadotropin (hCG) is produced by which placental cell layer?

Accepted Answer

Syncytiotrophoblast

Answer

The syncytiotrophoblast is the primary source of hCG, which maintains the corpus luteum and supports progesterone production in early pregnancy.

Question 3

A normal term pregnancy spans which gestational age range?

Accepted Answer

37–42 weeks

Answer

Term pregnancy is defined as 37 0/7 through 41 6/7 weeks of gestation, with early term (37–38+6), full term (39–40+6), and late term (41–41+6) subcategories.

Question 4

The normal umbilical cord contains how many vessels?

Accepted Answer

Two arteries and one vein

Answer

A normal umbilical cord has two umbilical arteries (carrying deoxygenated blood from fetus to placenta) and one umbilical vein (carrying oxygenated blood to the fetus).

Question 5

Which decidual layer lies directly beneath the chorionic villi at the placental implantation site?

Accepted Answer

Decidua basalis

Answer

The decidua basalis underlies the implanted blastocyst and forms the maternal component of the placenta, contributing to the basal plate.

(COBGC) Certified Obstetrics Gynecology Coder Practice Test

(COBGC) Certified Obstetrics Gynecology Coder Practice Test

COBGC Anatomy and Physiology 3