Review Test One Flashcards
Principal energy source for ejaculated spermatozoa is?
A.prostatic acid phosphatase
Fructose in seminal vehicle fluid
Of the barriers to sperm survival and transport within femal tract low pH is most important in the ?
Vagina
What is the most common condition associated with spontaneously aborted embryos?
Chromosomal abnormalities
What fissure from the implanting embryo directly interfaces with the endometrial CT? A.Corona radiate B.Inner cell mass C. Extra embryonic mesoderm D. Epiblast E.Synctitrophoblast
Syncytitrophoblast
Identical twinning is made possible by what process or property of early embryo? A. Regulation B. Aneuploidy C. Maternal imprinting D. Paternal imprinting E. X chromosomal inactivation
Regulation
The zone pellucida does what?
A. Aids in penetration of endometrial epithelium
B. Serves as a source of nutrients for embryo
C. Prevents premature implantation of cleaving embryo
D. All of above
E. None of above
As long as ZP is present in embryo it cant begin implantation so C. Prevents premature implantation of cleaving embryo.
Which of the following signaling paths is often involved in lateral inhibition? A. Hedgehog B. Delta notch C. Wnt D. RTK E. Retinol
Delta notch
TGF-B utilizes which of the following kinds of pathways? A. Hedgehog b. Delta notch C. Wnt D. RTK E. Region
D RTK
A mutation of what receptor is basis for basal carcinomas of the skin? A. Patched B. Retinoids acid C. Notch D. FGF receptor E. None of above
Patched
The principal inductor in primary neural induction is the?
A
Which of the following tissues arises from cells passing through primitive streak?
A
Cells of what germ layer are not present in oropharyngeal membrane?
Q
The prehordal plate plays an important role in regionalization of the?
Q
Brachyury a deficiency in caudal tissues in the body is caused by a mutation in what gene?
1
Which layer of bilaminar embryo gives rise to all of the embryonic tissue proper?
Q
