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Basic Science Embryology Gastrulation

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1. The process of formation of primary organ rudiment is called




2. During organogenesis hypomere mesoderm flanks theIntermediate




3. During gastrulation in frog the prospective nervous system mainly expand due to




4. In the Gastrula of frog which of the following layers line the roof of the archenteron and floor of the archenteron respectively




5. Gastrulation in Amphioxus occurs by a process of




6. Epiboly occurs in




7. In amphioxus gastrula achenteron is formed by the




8. The cavity formed during the process of gastrulation is called




9. The mass separation of cells from one another is called




10. In frog gastrula mesodermal cells remain separated from the notochordal cells by




11. Which of the following is called chordo-mesoderm




12. In gastrulation the movement of throwing in is known as




13. The term mesogenesis refers to the formation of




14. Yolk plug is found in the




15. In frog the gastrula is rotated to bring its antero-posterior axis in a




16. One of the following is not the type of emboly




17. In amphioxus gastrula circular rim is called




18. .Mesodermal cells are formed by




19. The organ that develops from ectoderm is




20. In amphioxus gastrula which tissue lies in the dorsal lip of blastopore




21. Which mesoderm flanks the neural tube and notochord




22. During organogenesis the splanchnic mesoderm lies next to the




23. In a developing embryo the nervous system is derived from the




24. When the micromeres divide rapidly and grow over the macromeres it is known as




25. The formation of brain and different sensory organs is called




26. Morphogenetic movements occur during




27. Which is the first indication of gastrulation in frog




28. One of the following is not a kind of tubulation




29. The rolling in of the superficial cells over the rim of the blastopore is called




30. Thyroid and anterior pituitary lobe are formed from the




31. During gastrulation in frog which is more active at the dorsal lip of blastopore




32. Pancreas is derived from the germinal layer of




33. During gastrulation which presumptive cells are found at the animal pole




34. In frog the lung and gills are developed from




35. The germinal layer from which the heart kidneys and spleen are formed is




36. During gastrulation ectoderm completely covers the whole embryo by




37. In frog gastrula the yolk plug is formed of




38. The organ which is produced from mesoderm after gastrulation in a frog is




39. Which one of the following is the mesodermal derivative




40. Heart and lymphatic system are formed from




41. Posterior lobe of pituitary is formed from the




42. The major system derived from the endoderm is