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EMBRYOLOGY EXAM II FORM A JUNE 30, 2003 1. The hyoid arch is the name often given to arch ____. A. one B. two C. three D. four E. six 2. The glossopharyngeal nerve innervates derivatives of which pharyngeal arch? A. one B. two C. three D. four E. six 3. Branches of the vagus nerve (CN X) innervate derivatives of arch ____. A. four B. six C. both D. neither 4. Since the muscles of facial expression are innervated by cranial nerve VII, you know they are derived from pharyngeal arch _____. A. one B. two C. three D. four E. six 5. Since the digastric muscle is innervated by both the trigeminal nerve and the facial nerve, you know that this muscle is derived from both the first and second pharyngeal arches. A. true B. false 6. The parathyroid glands are derived from pharyngeal pouch: A. three B. four C. both D. neither embryology exam II, form A, page 1, questions 1-6 7. Pharyngeal pouch _____ contributes to the development of the palatine tonsil. A. one B. two C. three D. four E. five 8. The thymus gland is derived from the dorsal wing of pharyngeal pouch four. A. true B. false MATCH THE FOLLOWING WITH THE FIGURE AT THE RIGHT. ONE ANSWER PER QUESTION. ANSWERS MAY BE USED MORE THAN ONCE. 9. Becomes the external acoustic meatus 10. Ultimobranchial body 11. Innervated by the facial nerve 12. Forms the eustacian tube 13. Gives rise to the stapes 14. Gives rise to the greater horn of the hyoid 15. Gives rise to the constrictor muscles of the pharynx 16. Gives rise to the mandible 17. The oral part of the tongue is derived from the: A. tuberculum impar B. lateral lingual swellings C. copula D. A and B E. A, B, and C 18. The root of the tongue is separated from the oral part of the tongue by the: A. hypobranchial eminence B. lingual septum C. median sulcus D. terminal sulcus embryology exam II, form A, page 2, questions 7-18 19. The muscles of the tongue are innervated by cranial nerve: A. V B. VII C. IX D. X E. XII 20. The first endocrine gland to appear in the embryo is the: A. thymus B. parathyroid C. thyroid D. adrenal 21. The opening from the mouth to the thyroid diverticulum is called the sulcus limitans. A. true B. false 22. The pyramidal lobe of the thyroid gland: A. is the largest lobe of the gland. B. is necessary for the gland to function properly. C. is a remnant of the thyroglossal duct. D. A and B E. A, B and C 23. The palatine shelves are derived from the: A. frontonasal prominence B. medial nasal prominence C. lateral nasal prominence D. mandibular prominence E. maxillary prominence 24. The secondary palate is derived from the: A. palatine shelves B. intermaxillary segment C. both D. neither 25. The landmark separating the primary and secondary palate is the: A. foramen cecum B. sulcus limitans C. incisive foramen D. lingual septum 26. The medial and lateral nasal prominences develop from the frontonasal prominence. A. true B. false embryology exam II, form A, page 3, questions 19-26 27. The caudal boundary of the stomodeum is formed by the: A. frontonasal prominence B. medial nasal prominence C. lateral nasal prominence D. maxillary prominence E. mandibular prominence 28. The philtrum of the upper lip is formed from the: A. frontonasal prominence B. medial nasal prominence C. lateral nasal prominence D. maxillary prominence E. mandibular prominence 29. The nasal placodes appear on the frontonasal prominence. A. true B. false 30. The alae of the nose are derived from the: A. frontonasal prominence B. medial nasal prominence C. lateral nasal prominence D. maxillary prominence E. mandibular prominence 31. Anomalies associated with pharyngeal arch one include: A. Pierre Robin syndrome B. Treacher Collins syndrome C. both D. neither 32. Children with DiGeorge syndrome have an underdeveloped thymus. A. true B. false 33. Branchial cysts are normally found: A. in the midline near the hyoid bone B. along the anterior border of the sternocleidomastoid muscle. C. both D. neither 34. Ankyloglossia is a condition associated with the: A. thyroid gland B. thymus gland C. secondary palate D. primary palate E. tongue embryology exam II, form A, page 4, questions 27-34 35. A cleft of the upper lip is always associated with a posterior cleft palate. A. true B. false 36. The developing eyeball is derived from the forebrain. A. true B. false 37. The lens of the eye is derived from the: A. forebrain B. surface ectoderm C. choroid D. sclera 38. The pars ceca retinae gives rise to the: A. neural layer of the retina B. pigmented layer of the retina C. optic stalk D. iris 39. The mesenchyme surrounding the developing eye develops into the: A. sclera B. choroid C. both D. neither 40. Rubella infection during weeks 4-8 can result in damage to the: A. eye B. ear C. both D. neither 41. The inner ear is derived from the: A. forebrain B. surface ectoderm C. hindbrain D. pharyngeal pouch one 42. The eardrum develops between pharyngeal cleft one and pharyngeal pouch one. A. true B. false 43. Bones of the middle ear are derived from arch: A. I B. II C. both D. neither embryology exam II, form A, page 5, questions 35-43 MATCH THE FOLLOWING WITH THE FIGURE AT THE RIGHT. ONE ANSWER PER QUESTION. ANSWERS MAY BE USED MORE THAN ONCE. 44. membranous labyrinth 45. external acoustic meatus 46. meatal plug 47. eustacian tube 48. Extraembryonic membranes that regress by the end of the first trimester include: A. amnion and yolk sac. B. chorion and yolk sac C. amnion and chorion D. chorion and allantois E. yolk sac and allantois 49. Contents of the mature umbilical cord include: A. two arteries and a vein B. intestinal loops C. allantois D. A and B E. A, B, and C 50. Dizygotic twins do not share a common amnion. A. true B. false END OF EXAM embryology exam II, form A, page 6, questions 44-50