T1 Review Q

Question 1

The principal energy source for the 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

Answer 1

D. Fructose in seminal vesicle fluid

Question 2

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

Answer 2

E. Vagina

Question 3

What is the most common condition associated with spontaneously aborted embryos?
A. Maternal imprinting
B. Paternal imprinting
C. Ectopic pregnancy
D. Chromosomal abnormality
E. Lack of X-chrome inactivation

Answer 3

D. Chromosomal abnormality

Question 4

What tissue from the implanting embryo directly interfaces with the endometrial connective tissue?
A. corona radiata
B. Inner cell mass
C. Extraembryonic mesoderm
D. Epiblast
E. Syncytiotrophoblast

Answer 4

E. Syncytiotrophoblast

Question 5

Identical twinning is made possible by what processes or property of the early embryo?
A. Regulation
B. Aneuploidy
C. Paternal imprinting
D. Maternal imprinting
E. X-chrome inactivation

Answer 5

A. Regulation

Question 6

The zona pellucida:
A. Aids in the penetration of the endometrial epithelium
B. Serve as a source of nutrients for the embryo
C. Prevents premature implantation of the cleaving embryo
D. All of the above
E. None of the above

Answer 6

C. Prevents premature implantation of the cleaving embryo

Question 7

Which of the following signaling pathways is often involved in lateral inhibition?
A. Hedgehog
B. Delta notch
C. Wnt
D. Receptor tyrosine kinase
E. retinol

Answer 7

B. Delta Notch

Question 8

TGF-B often utilizes what of the following kinds of pathways?
A. hedgehog
B. Delta notch
C. Wnt
D. Receptor tyrosine kinase
E. retinol

Answer 8

D. Receptor tyrosine kinase

Question 9

During oogenesis there are two meiotic arrests. The first meiotic arrest occurs in which of the following stages of meiosis?
Diplotene stage of prophase I
Diakinesis stage of prophase I
Metaphase I
Anaphase I
Metaphase II

Answer 9

Diplotene stage of prophase I

Question 10

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 mesentary
Primitive streak
Yolk Sac 
Chorion

Answer 10

Yolk sac

Question 11

Which of the following best describes the oogonium in the ovary during the early fetal period?
Haploid oogonium with 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

Answer 11

Diploid oogonium with no follicle cells

Question 12

In meiosis, pairing of homologous chromosomes begins during which of the following stages of prophase I?
Leptotene
Zygotene
Pachytene
Diplotene

Answer 12

Zygotene

Question 13

Which of the following refers to the process by which a cell or part of an embryo become restricted to a given developmental pathway?
Morphogenesis
Differentiation
Ontogeny
Determination

Answer 13

Determination

Question 14

After the first meiotic arrest, the secondary oocyte resumes meiosis at the time of ovulation. This resumption of meiosis is enable by closure of gap junctions between granulosa cells and the oocyte. Which of the following is responsible for shutting down the gap junctions?
LH
FSH
Progesterone
Estrogen

Answer 14

LH

Question 15

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
Epididymus
Vas deferens

Answer 15

Isthmus of the oviduct