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6 Cards in this Set
- Front
- Back
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Trace Spermatogenesis
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spermatogonium (2n) -> spermatocyte (2n) -> meiosis I = 2 spermatocytes -> meiosis IO = 4 spermatocytes
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Trace Oogenesis
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1)Oogonium - early in embryo development (2n)
2)Primary oocyte (start meiosis I) 3)Secondary oocyte & polar body (after meiosis I) 4)Ovum & polar body (after meiosis II) After puberty once a month (ovulation) Secondary oocyte -> ovum |
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Fastblock
Change in ________ along the cell's membrane Overall change of ________ inside vs. outside |
membrane potential
charge |
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Slowblock
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fusion of the egg and sperm
(learn how this happens) |
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What are the three stages of labor?
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1) cervix dialation
2) expulsion 3) delivery of placenta |
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Why are fetuses so vulnerable to environmental toxicants?
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b/c the placenta is a permeable membrane, things can pass across
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