MCDB Low Lecture #12

MCDB Low Lecture #12 - MCDB Low Lecture #12 Leftovers from...

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MCDB Low Lecture #12 Leftovers from Fertilization Cortical granules - membrane-bound structures in the egg, derived from the Golgi apparatus, and found just beneath the plasma membrane. The cortical reaction is the release of their contents (proteases, mucopolysaccharides, and peroxidases) by fusion with the plasma membrane; the changes caused by the cortical reaction help to prevent polyspermy. Cummulus – is a cluster of cells (called cumulus cells) that surround the oocyte both in the ovarian follicle and after ovulation. Zona pellucida - a thick extracellular matrix surrounding the mammalian ovum (egg) which binds sperm and initiates the acrosome reaction of the sperm. Principles of Early Development Phase 1: Cell cleavage and organization of the body plan Phase 2: Organogenesis (development of the organ systems) Phase 3: Growth Phase 1 Properties In many organisms immediately after fertilization, the number of cells increases rapidly by many mitotic divisions in succession.
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This note was uploaded on 01/19/2012 for the course MCDB 1a taught by Professor Feinstein during the Fall '08 term at UCSB.

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MCDB Low Lecture #12 - MCDB Low Lecture #12 Leftovers from...

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