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