BIOL-4501 Chapter Notes - Chapter 8: Oviduct, Tyrosine Kinase, Nuclear Membrane
8 Dec 2016
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Preformationism- each person has little people within them. Epigenesis: individuals acquire their final forms through series of progressive changes. Cell division- zygote cleavages to form morula (embryo) Differentiation- generation of diverse cells with cell fate specifications. Gastrulation to create blastula and eventually gastrula to create germ layers. The acrosome (i. e. acrosomal vesicle) is a modified golgi complex that contains enzymes that degrade proteins and complex carbohydrates for the digestion of extracellular egg coats. Actins (globular proteins) exist between the nucleus and acrosomes. The tail consists of a flagellum attached to two centrioles at the base of the nucleus. The nucleus and centrioles are contributed to the embryo; the rest is degraded. Invertebrate egg is very nutrient rich with a glycoprotein rich coat called the zona pellucida in mammals and vitelline envelope in other organisms. Cytoplasm contains biochemical determinants for the early stages of development. Actin makes gel cortex stiff under the plasma membrane, around the periphery of the cell.
