Embryology And Development Question Preview (ID: 42244)
Embryology And Development.
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The chorion (smooth and villus) develops from the:
a) blastocele.
b) trophoblast.
c) inner cell mass.
d) yolk sac.
Oxygenated fetal blood is carried from the placenta to the fetus via the:
a) 1 umbilical vein.
b) 2 umbilical veins.
c) 2 umbilical arteries.
d) 1 umbilical artery.
The innermost layer of the uterus is called the myometrium.
a) True
b) False
c)
d)
The function of the hormone chorionic gonadotropin (hCG) is to:
a) cause contractions of the uterus.
b) stimulate milk production.
c) relax the pubic symphysis.
d) maintain the corpus luteum.
It is impossible for sperm to be functional (able to fertilize the egg) until after:
a) the tail disappears.
b) they become spermatids.
c) they undergo capacitation.
d) they have been stored in the uterus for several days.
A developing human for the first 2 months after fertilization is called a(n):
a) neonate.
b) fetus.
c) embryo.
d) zygote.
Muscle, bone and other connective tissues develop from the:
a) mesoderm
b) endoderm
c) ectoderm
d) Hensen’s node
Twins formed from two different fertilized eggs are:
a) fraternal.
b) as different as any 2 siblings.
c) dizygotic.
d) All of these are correct.
Colostrum is:
a) the opening to the uterus from the vagina.
b) the removal of the prepuce or foreskin of the penis.
c) the area located between the pubic symphysis and the coccyx.
d) a fluid released at the beginning of breast feeding.
The moment of TRUE fertilization of the ovum occurs:
a) when the nuclei of the sperm and ovum fuse together.
b) during the first cleavage of the zygote.
c) when the sperm is capacitated.
d) when the sperm breaks through the zona pellucida.
Which of the following is the embryonic contribution to the placenta?
a) Stratum basalis.
b) Smooth chorion.
c) Decidua parietalis.
d) Chorionic villus.
This is the development of the embryo outside of the uterus.
a) Trophoblast
b) Etopic pregnancy
c) Fraternal pregnancy
d) Trophocele pregnancy
The enzymes that allow implantation to occur are produced by the:
a) acrosome.
b) cytotrophoblast.
c) syncytiotrophoblast.
d) blastocele.
Uterine tissue that covers and surrounds the developing embryo is the:
a) decidua capsularis.
b) decidua basalis.
c) deciduas parietalis.
d) blastocele.
The ductus arteriosus of the fetal circulation:
a) shunts blood so it bypasses the liver.
b) shunts blood from the right atrium to the left atrium.
c) shunts blood from the left ventricle to the aorta.
d) shunts blood in the right ventricle to the aorta.
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