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Lab 11

Lab 11. Survey of Embryonic Development. Lab 11. Hormonal controls of the menstrual (ovarian and uterine) cycles Fertilization, implantation, and early development Final lab practical this time next week. Ovulation. Ovarian and Menstrual Cycle Regulation. Fertilization.

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Lab 11

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  1. Lab 11 Survey of Embryonic Development

  2. Lab 11 • Hormonal controls of the menstrual (ovarian and uterine) cycles • Fertilization, implantation, and early development • Final lab practical this time next week

  3. Ovulation

  4. Ovarian and Menstrual Cycle Regulation

  5. Fertilization The Five Steps in Sperm Entry • Chemotaxis • Acrosome Reaction • Sperm-Egg Binding • Plasma Membrane Fusion • Block to Polyspermy

  6. Sperm penetration and the cortical reaction

  7. The Events which Occur in the Egg with Gamete Contact & Fusion

  8. The Change in Membrane Potential in Egg is the Fast Block to Polyspermy

  9. The Events which Occur in the Egg with Gamete Contact & Fusion

  10. Sperm penetration and the cortical reaction

  11. The Cortical Reactions Raise the Fertilization Envelope & Provide the Slow Block to Polyspermy

  12. Zygote Formation

  13. Figure 29.4 Cleavage is a rapid series of mitotic divisions that begins with the zygote and ends with the blastocyst Cleavage and Implantation

  14. Events of placentation, early embryonic development and formation of the embryonic membranes hCG = human Chorionic Gonadotropin signals placenta formation after implantation

  15. Events of placentation, early embryonic development and formation of the embryonic membranes

  16. 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

  17. 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

  18. When and Where Will It All End?

  19. Complete Assignment 11 on MasteringAandP. Homework

  20. End Lab 11

  21. Fertilization (NOT MAMMALIAN!)

  22. The Change in Membrane Potential in Egg is the Fast Block to Polyspermy

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