Quiz 5 - 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 The embryonic stage where the cells form hollow ball is called blastulation When cells move from the

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1.                  The embryonic stage where the cells form hollow ball is called  blastulation . 2.                  When cells move from the surface of the hollow ball to the interior and form a pore on the surface, it is called  invagination . 3.                  The three primary germ layers formed by this cell movement are the  endoderm ectoderm , and  mesoderm . 4.                  Ca ++  induces membrane-bound vesicles, called  cortical granules , to fuse with the plasma membrane in the  sea urchin shortly after fertilization. 5.                  In the sea urchin, one function of the fertilization membrane is to block  polyspermy . 6.                  When a zygotic cell only partially cleaves and the yolk does not divide, it is called  meroblastic  cleavage. 7.                  When a zygotic cell completely cleaves, it is called 
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This note was uploaded on 05/01/2008 for the course BIO 206L taught by Professor Unknown during the Spring '08 term at University of Texas at Austin.

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