In the sea urchin, antibodies to can block mesoderm cell migration. LH receptors

Question

In the sea urchin, antibodies to can block mesoderm cell migration. LH receptors FSH receptors Fibronectin Type 4 collagen All of these responses None of these responses The contractile ring is formed parallel to centrioles parallel to the microtubules perpendicular to the microfilaments perpendicular to microtubules mitosis promoting factor is active in cells in G zero cells in G one cells in G two none of these responses cytochalasin B disrupts Karyokinesis Cytokinesis Desrnosomes none of these responses

Explanation / Answer

Fibronectin is the extracellular matrix substance that serves in migration of cells by providing them an anchorage for crawling. During migration of mesodermal cells, these fibres serve as the substratum along which the cells migrate. Injection of antifibronectin antibodies to the develpoing embryo disturbs the attachment of migrating cells to the fibronectin and thereby prevents the migration of mesodermal cells. Correct answer is C.

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