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12. The Prosencephalon is subdivided into A. Mesencephalon and Rhombencephalon B. Diencephalon and Metencephalon C. Telencephalon and Diencephalon D. Metencephalon and Rhombencephalon E Metencephalon and Mylencephalon 13. During neurulation the embryo is called a A. Zygote B. Blastula C Morula D. Gastrula E. Neurola 14. Which of the following matches is incorrect? A. Dorsal lip of the blastopore Planar signal B Chordamesoderm-Vertical sigual C. Epidermal Ectoderm Planar signal D. Neural Ectoderm-Vertical signal E. Cand D 15. Which of the following is not a part of the multi-step process of neural induction? A Cytoplasmic rearrangements B. Dorsal mesoderm infection C Ventral mesoderm induction D. Planar neural induction E. Vertical neural induction is called the organizer. In the amphibian embryo it can induce the formation of the embryonic 16. The axis. A. Ectoderm Notochord B. Blastopore C. Henson's node D. Dorsal lip of blastopore E 17. The ureteric bud gives rise to the ureterrenal pelvis. calyces and collecting tubules of the kidney A True B. Falas 18. The pharyngeal pouches give rise to all of the following EXCEPT the A. Eustachian tube C. Tonsils D. Thyroid D. Thyroid E Middle ear 19. Which of the following does NOT arise from the foregut? A Esophagus B. Duodenum C. Stomach D. Rectum E B and D 20. Which of the following constitutes the hind brain? B. Diencephalon and Metencephalon D. Metencephalon and Rhombencephalon A. Mesencephalon and Rhombencephalon C. Telencephalon and Diencephalon E. Metencephalon and Myelencephalon 21. The A. Paraxial mesoderm D. Somatic layer gives rise to the kidneys and some of the reproductive structures B. Axial mesoderm C Intermediate mesoderm E. Visceral layer 22. Which of the following forms the epidermis and neural tissue? A. Ectoderm B. Endoderm C. Mesoderm D. Both A and B degenerates (breaks down) in females. It gives rise to parts of male reproductive D. Nephric ducts 23. The system. A. Wolffian duct 24. The mesoderm B. Dermatome B. Ureteric bud C. Mallerian duct gives rise to the myotome. E. Pronephros A. Intermediate E Lateral plates C. Dermamyotome Dermatome D. Sclerotome Sclerotome

Answer 1

12. Answer is: C. Telencephalon and Diencephalon

The prosencephalon becomes subdivided into the anterior telencephalon and the more caudal diencephalon.

13. Answer is: E. Neurula

16. Answer is: C. Henson's node

Hans Spemann (1869 - 1941) was a German embryologist who worked extensively on amphibian development and was the discoverer of the organiser region. The region in birds is known as "Hensen's node" named for Victor Hensen.

17. Answer is: A. True

The elongated stalk of the ureteric bud, later forms the ureter. As the cranial end of the bud extends into the intermediate mesoderm, it undergoes a series of branchings to form the collecting duct system of the kidney. It also forms the major and minor calyces and the renal pelvis.

18. Answer is: A. Eustachian tube

The pharyngeal pouches develop into a series of structures that include the pharyngotympanic tube, middle ear cavity, palatine tonsil, thymus, the four parathyroid glands, and the ultimobranchial bodies of the thyroid gland.