Exam 1 Review Questions Flashcards
The principal energy source for ejaculated spermatozoa is:
Prostatic acid phosphatase Internal glucose Prostatic citric acid Fructose in seminal vesicle fluid Glycogen released from vaginal epithelium
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:
Upper Uterine Tube Lower Uterine Tube Uterine Cavity Cervix Vagina
Vagina
What is the most common condition associated with spontaneously aborted embryos?
Maternal imprinting Paternal imprinting Ectopic pregnancy Chromosomal abnormalities Lack of X-chromosomal inactivation
Chromosomal abnormalities
What tissue from the implanting embryo directly interfaces with the endometrial connective tissue?
Corona Radiata Inner Cell Mass Extraembryonic mesoderm Epiblast Syncytiotrophoblast
Syncytiotrophoblast
Identical twinning is made possible by what process or property of the early embryo?
Regulation Aneuploidy Paternal imprinting Maternal imprinting X-Chromosomal Inactivation
Regulation
The Zona Pellucida:
Aids in penetration of the endometrial epithelium
Serve as a source of nutrients for the embryo
Prevents premature implantation of the cleaving embryo
All of the above
None of the above
Prevents premature implantation of the cleaving embryo
Which of the following signaling pathways is often involved in lateral inhibition?
Hedgehog Delta Notch WNT Receptor Tyrosine Kinase Retinol
Delta Notch
TGF-Beta often utilizes which of the following kinds of pathways?
Hedgehog Delta Notch WNT Receptor Tyrosine Kinase Retinol
Receptor Tyrosine Kinase
During oogenesis there are two meiotic arrests. The first meiotic arrest occurs at which of the following stages of meiosis?
Diplotene stage of prophase I Diakinesis stage of prophase I Metaphase I Anaphase I Metaphase II
Diplotene stage of prophase I
Primordial germ cells migrate from their point of origin in the very early embryo into the developing gonads. In mammalian embryos and many other vertebrate embryos, the primordial germ cells originate from and are first observed in which of the following locations?
Hindgut Dorsal mesentery Primitive streak Yolk sac Chorion
Yolk sac
Which of the following best describes the oogonium in the ovary during the early fetal period?
Haploid oogonium with a single layer of cuboidal follicle cells
Diploid oogonium with no follicle cells
Haploid oogonium with no follicle cells
Diploid oogonium with a few flattened follicle cells
Diploid oogonium with no follicle cells
In meiosis, pairing of homologous chromosomes beings during which of the following stage of prophase I:
Leptotene
Zygotene
Pachytene
Diplotene
Zygotene
Which of the following refers to the process by which a cell or part if an embryo becomes restricted to a given developmental pathways?
Morphogenesis
Differentiation
Ontogeny
Determination
Determination
After the first meiotic arrest, the secondary oocyte resumes meiosis at the time of ovulation. This resumption of meiosis is enabled by closure of gap junctions between granulosa cells and the oocyte resulting in a reduction in the low of cAMP into the oocyte. Which of the following is responsible for shutting down the gap junctions?
LH
FSH
Progesterone
Estrogen
LH
Capacitation involves the removal of cholesterol and glycoproteins from the sperm surface. It is necessary for the sperm to fertilize the egg. Capacitation occurs in which part of the following locations?
Isthmus of the oviduct
Ampulla of the oviduct
Epididymis
Vas Deferens
Isthmus of the oviduct
