Placentation and Maternal Recognition of Pregnancy Review Quiz

 

1. The formation of the blastocyst involves the pump of Na and H2O into the center of the embryo.
True
False
2. Hatching of the bovine blastocyst ocurrs on days 9 - 11.
True
False
3. While the cow, sheep and pig conceptus go through a spherical, tubular and filamentous stage, the equine conceptus remains spherical.
True
False
4. Transmigration of the embryo from one uterine horn to the other occurs in the pig and horse but not in the sheep and cow.
True
False
5. During gastrulation, the endoderm lines the inside of the blastocoele cavity, forming the yolk sac portion of the placenta.
True
False
6. Which of the following tissues are derived from the ectoderm?
skin
central nervous system
reproductive tract
lung
7. Which of the following tissues are derived from the mesoderm?
skin
central nervous system
reproductive tract
lung
8. Which of the following tissues are derived from the endoderm?
skin
central nervous system
reproductive tract
lung
9. Which placental membranes functions to provide the source of primordial germ cells and red blood cells.
Yolk Sack
Amnion
Allantois
Chorion
10. Which placental membranes functions to bring the blood vessels to the surface of the placenta?
Yolk Sack
Amnion
Allantois
Chorion
11. Which placental membranes functions as a shock absorber and is non-vascular?
Yolk Sack
Amnion
Allantois
Chorion
12. Which placental membranes attaches to the mother?
Yolk Sack
Amnion
Allantois
Chorion
13. The signal for maternal recognition of pregnancy in the cow is the production of an interferon tau by the early conceptus.
True
False
14. The signal for maternal recognition of pregnancy in the pig is production of porcine chorionic gonadotropin.
True
False
15. There is no maternal recognition of pregnancy event in the dog and cat. The CL in the non-pregnant and pregnant animal last the same period of time.
True
False
16. Which of the following have a superficial type of implantation?
cow
sheep
sow
rat
human
17. Which of the following have a interstitial type of implantation?
cow
sheep
sow
rat
human
18. Which of the following have a cotelydonary placenta?
cow
pig
dog
human
19. Which of the following have a zonary placenta?
cow
pig
dog
human
20. The binuclear giant cells of the bovine placenta produce
placental lactogen.
interferon tau.
pregnancy specific protein B.
prostaglandin.
21. Maternal and fetal blood is separated by 3 tissue layers in a hemoendothelial placenta.
True
False
22. Maternal and fetal blood is separated by 6 tissue layers in a epithelialchorial placenta.
True
False