Exam #1- Clicker Questions Flashcards
The principal energy source for ejaculated spermatozoa is:
A- Prostatic acid phosphatase B- Internal glucose C- Prostatic citric acid D- Fructose in seminal vesicle fluid E- Glycogen released from the vaginal epithelium
D- Fructose in seminal vesicle fluid
Of the barriers to sperm survival and transport within the female reproductive tract, low pH is most important in the:
A- Upper uterine tube B- Lower uterine tube C- Uterine cavity D- Cervix E- Vagina
E- Vagina
What is the most common condition associated with spontaneously aborted embryos?
A- Maternal imprinting B- Paternal imprinting C- Ectopic pregnancy D- Chromosomal abnormalities E- Lack of X-chromosomal inactivation
D- Chromosomal abnormalities
What tissue from the implanting embryo directly interferes with the endometrial connective tissue?
A- Corona radiata B- Inner cell mass C- Extraembryonic mesoderm D- Epiblast E- Syncytiotrophoblast
E- Syncytiotrophoblast
Which of the following is a transcription factor?
A- FCF B- Pax C- TGF D- Notch E- Wnt
B- Pax
Zinc fingers or helix arrangements are characteristics of members of what class of molecules?
A- Proto-oncogenes B- Signaling molecules C- Receptors D- Transcription factors E- None of the above
D- Transcription factors
Shh is produced in which signaling center?
A- Notochord B- Intestinal portals C- Floor plate of neural tube D- Zone of polarizing activity in the limb bud E- All of the above
E- All of the above
Based on your knowledge of paralogous groups, which genes would be expressed most Anteriorly in the embryo?
A- Hoxa 13 B- Hoxc 9 C- Hoxd 13 D- Hoxb 1 E- Hoxb 6
D- Hoxb 1
The principal inducer in primary neural induction is the:
A- Hypoblast B- Primitive streak C- Extraembryonic mesoderm D- Notochord process E- Embryonic ectoderm
D- Notochord process
Cells of which germ layer are NOT present in the oropharyngeal membrane?
A- Ectoderm
B- Mesoderm
C- Endoderm
D- All are present
B- Mesoderm
Brachyury (short tail), a deficiency in caudal tissues in the body is caused by a mutation in what gene?
A- Lim1 B- Noggin C- T D- Shh E- Activin
C- T
