Review questions for Chapter 5

Question 1

An ectopic pregnancy would occur if implantation occurred in all of the following places EXCEPT:

a) Rectum
b) Bladder
c) Uterus
d) Cervix
e) Fallopian tube

Answer 1

c) Uterus

Question 2

The two layers of extraembryonic mesoderm are called:

a) Endoderm; Mesoderm
b) Primary; Secondary
c) Somatic; Splanchnic
d) Mesenchyme; Parachyme
e) Epiblast; Hypoblast

Answer 2

c) Somatic; Splanchnic

Question 3

The cells that continue to divide from the trophoblast are called:

a) Syncytiotrophoblast
b) Cytotrophoblast
c) Epiblast
d) Hypoblast
e) Tertiary stem villi

Answer 3

b) Cytotrophoblast

Question 3

On what day does gastrulation occur?

a) 14
b) 16
c) 18
d) 20
e) 22

Answer 3

b) 16

Question 4

This is responsible for the left-sidedness of the body axis:

a) PITX2
b) Serotonin
c) Hedgehog
d) SNAIL
e) FGF 8

Answer 4

a) PITX2

Question 4

On what day of development is the Heuser’s membrane formed?

a) Day 9
b) Day 11
c) Day 8
d) Day 13
e) Day 12

Answer 4

a) Day 9

Question 4

Which of the ff refers to normal internal organs positioning?

a) Situs inversus
b) Situs solitus
c) None of the choices
d) Heterotaxy
e) Situs ambiguous

Question 4

Overexpression of this gene might end up in conjoined twins

a) OTX2
b) HESX1
c) CHORDIN
d) LIM1
e) GOOSECOID

Answer 4

e) GOOSECOID

Question 4

The ff. Are inhibitors of the serotonin reuptake, EXCEPT

a) Zoloft
b) None of the above
c) Prozac
d) Celexa
e) Paxil

Answer 4

b) None of the above

Question 5

Which among the ff extends from the chorionic plate up to the
decidual plate?
a) Tertiary villus
b) Primary villus
c) Secondary villus
d) Definitive placental villus
e) Stem or anchoring villi

Answer 5

e) Stem or anchoring villi