Lab 11 Survey of Embryonic Development. Lab 11 Hormonal controls of the menstrual (ovarian and...
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Transcript of Lab 11 Survey of Embryonic Development. Lab 11 Hormonal controls of the menstrual (ovarian and...
![Page 1: Lab 11 Survey of Embryonic Development. Lab 11 Hormonal controls of the menstrual (ovarian and uterine) cycles Fertilization, implantation, and early.](https://reader036.fdocuments.in/reader036/viewer/2022062516/56649e0d5503460f94af69af/html5/thumbnails/1.jpg)
Lab 11
Survey of Embryonic
Development
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Lab 11
Hormonal controls of the menstrual (ovarian and uterine) cycles
Fertilization, implantation, and early development
Final lab practical this time next week
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Ovulation
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Ovarian and Menstrual Cycle Regulation
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Fertilization
The Five Steps in Sperm Entry
1. Chemotaxis2. Acrosome Reaction3. Sperm-Egg Binding4. Plasma Membrane Fusion5. Block to Polyspermy
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Sperm penetration and the cortical reaction
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The Events which Occur in the Egg with Gamete Contact & Fusion
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The Change in Membrane Potential in Egg is the Fast Block to Polyspermy
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The Events which Occur in the Egg with Gamete Contact & Fusion
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Sperm penetration and the cortical reaction
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The Cortical Reactions Raise the Fertilization Envelope & Provide the Slow Block to Polyspermy
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Zygote Formation
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Figure 29.4 Cleavage is a rapid series of mitotic divisions that begins with the zygote and ends with the blastocyst
Cleavage and Implantation
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hCG = human Chorionic Gonadotropinsignals placenta formation after implantation
Events of placentation, early embryonic development and formation of the embryonic membranes
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Events of placentation, early embryonic development and formation of the embryonic membranes
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Labor and Delivery ANS stimulation and
positive feedback from the fetal movements
Oxytocin and local prostaglandins
Placenta discharge = “afterbirth”
Uterine contractions to reduce post-partum hemorrhage
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Labor and Delivery; Lactation Estrogens and
progesterone assist prolactin in readying breast for colostrum and milk production
Oxytocin stimulation from positive feedback from the infant suckling
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When and Where Will It All End?
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Homework
Complete Assignment 11 on MasteringAandP.
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End Lab 11
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Fertilization (NOT MAMMALIAN!)
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The Change in Membrane Potential in Egg is the Fast Block to Polyspermy