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28 Cards in this Set

  • Front
  • Back
0-2 months old
2 months +
where does fertillization occur?
oviduct (Fallopian tube)
What is the name of the sex-determning region of the Y chromosome?
What does SRY stimulate?
SRY stimulates the production of H-Y antigen in plasma membrane of the undifferentiated region of the gonads
What week does SRY on Y chromosome masculinize the gonads
7th week
How does the H-Y Ag direct the differentiation of gonads into testes?
H-Y Ag cause the testes to secrete T and Mullerian-inhibiting factor
What does the Mullerian inhibiting factor do?
in males it causes the degeneration of the Mullerian ducts
What are the 2 roles of T in male development?
1) T is converted to dihydrotestosterone which promotes the development of undifferentiated external genitalia along male lines
2. T transforms Wolffian ducts into male reproductive tract
Is male development an active proces?
yes, it requires masculinizing factors
In F, with no H-Y Ag, what happens?
gonads develop into ovaries, no T or Mullerian-inhibiting factor are secreted
Without T in women, what happens?
wolffian ducts degenerate and undifferentiated external genitalia develop along female les
Without the Mullerian-inhibiting factor in women, what happens?
Mullerian ducts developinto female reproductive tract
What is the role of P in female?
prepares suitable environment for nourishing developing embryo and fetus
what are oogonia?
undifferentiated primordial sex cells that divide mitotically
During which month of gestation does mitosis stop in females?
5th month of gestastion
what is the oogonium surrounded by?
granulosa cells, making the primary follicle
the first meitotic division of oogonium produces a ????
primary oocyte (diploid)
just before ovulation, the primary oocyte completes its first meiotic division. what are the 2 products?
a larger secondary oocyte and a polar body (degenerates); the secondary oocyte is ovulated and possibly fertilized
what happens if sperm enters into the secondary oocyte is if is ovulated?
the sperm triggers a second meitoic division and the meiosis produces a second polar body (haploid), and a haploid, mature ovum
how many chromosomes does a primary oocyte have?
46 (diploid)
which cells proliferate during the follicular phase?
granulosa cells of primary follicles proliferate
ooyte inside each follicle enlarge (not all oocytes do this)
thecal and granulosa cells, called folliclular cells, secrete increased amts of E
what happens during days 0-14 in female reproductive cycle?
increase amts of E secreted by granulosa cells proliferate, oocyte increases in size,antrum develops
what is the zona pellucida?
barrier between primary oocyte and granulosa cells, it is secreted by granulosa cells
What in the F reproductive cycle positively influence themselves to secrete more E?
granulosa cells
What happens on day 14 of F reproductive cycle?
mature follicle and oocyte is released (ovulation),. end of follicular phase, just before ovulation is finished is the 1st meiotic division, follicular cells degenerate
what does the corpus luteum secrete?
lots of P and E
luteal cells hypertrophy and become sroidalgenic
If there is no fertilization and implantation does NOT occur, what happens to corpus lutem?
it degenerates 14 days after its formation