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3.4 Gastrulation & Somites — Test 1
Q1. Gastrulation is the process that:✓ Rearranges the blastula into a three-layered embryo with germ layers
Q2. Invagination during gastrulation is:✓ The infolding of a sheet of epithelial cells
Q3. Involution during gastrulation refers to:✓ The inward rolling of a cell sheet beneath the surface
Q4. Ingression during gastrulation is:✓ The migration of individual cells from the surface into the interior
Q5. Delamination during gastrulation is:✓ The splitting of one cell sheet into two parallel sheets
Q6. Epiboly during gastrulation is:✓ The spreading of an outer cell layer over the internal surface of the embryo
Q7. The rolling of sheets of endodermal and mesodermal cells from the surface into the interior is called:✓ Involution
Q8. Migration of an expanding outer layer so it spreads over the internal surface is:✓ Epiboly
Q9. Which of these is NOT a typical gastrulation movement?✓ Furrowing
Q10. Which developmental process is MOST dependent on coordinated cell movements?✓ Morphogenesis (e.g. gastrulation)
Q11. Amphibian gastrulation begins with the inward movement of:✓ Bottle cells at the dorsal lip
Q12. 'Bottle cells' during gastrulation are characteristic of which group?✓ Amphibians
Q13. The blastopore formed at gastrulation is the:✓ Opening through which cells move into the interior
Q14. The cavity formed by invagination during gastrulation, which becomes the gut, is the:✓ Archenteron
Q15. Somites are blocks of ____ that form along the body axis during development.✓ Paraxial mesoderm
Q16. Somites give rise to all of the following EXCEPT:✓ The gut lining
Q17. In the chick embryo, the structure equivalent to the amphibian blastopore, through which cells ingress, is the:✓ Primitive streak
Q18. Fibronectin in the gastrulating embryo is important because it:✓ Provides a substrate that mesodermal cells migrate along
Q19. Embryonic fields are regions of the early embryo that:✓ Will form a particular structure and can regulate as a unit