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EMBRYOLOGY EXAM II FORM A MARCH 1, 2002 MATCH THE FOLLOWING. ONE ANSWER PER QUESTION. ANSWERS MAY BE USED MORE THAN ONCE. A. arch I B. arch II C. 1. Meckel's cartilage 2. thyroid cartilage 3. greater horn of the hyoid bone 4. Muscles of facial expression. 5. Muscles of mastication 6. Constrictor muscles of the pharynx 7. Trigeminal nerve 8. Lateral palatine processes (shelves) 9. Pharyngeal arch I is innervated by CN VII A. true B. false arch III D. arch IV MATCH THE FOLLOWING. ONE ANSWER PER QUESTION. ANSWERS MAY BE USED MORE THAN ONCE A. pouch 1 D. pouch 4 B. pouch 2 E. none of the above C. pouch 3 10. Parafollicular cells of the thyroid gland 11. Epithelial crypts of the palatine tonsil 12. Middle ear cavity 13. Follicular cells of the thyroid 14. The otic vessicle gives rise to which of the following? A. saccule B. utricle C. semicircular canals D. cochlear duct E. all of the above. embryology exam II, form A, page 1, questions 1-14 15. All of the following are derived from pharyngeal arch II except: A. stapes B. styloid process C. incus D. superior portion of hyoid bone E. all are derived from arch II. 16. The cartilages of the larynx are derived mainly from the cartilages of which of the following pharyngeal arches? A. 2 and 3 B. 3 and 4 C. 3,4, and 5 D. 4 and 6 E. 4 and 5 17. Structures derived from the surface ectoderm include the: A. lens B. otic vesicle C. external acoustic meatus D. corneal epithelium E. all of the above 18. Which pharyngeal arch is associated with Treacher Collins syndrome? A. arch 1 B. arch 2 C. arch 3 D. arch 4 E. arch 6 19. Which of the following structures is involved in the formation of a posterior cleft palate? A. pharyngeal arch 2 B. pharyngeal arch 3 C. palatine shelves D. frontonasal prominence E. maxillary process and medial nasal prominence 20. Which of the following structures is involved in the formation of a cleft lip? A. pharyngeal arch 2 B. pharyngeal arch 3 C. palatine shelves D. frontonasal prominence E. maxillary process and medial nasal prominence embryology exam II, form A, page 2, questions 15-20 21. If the greater cornu and inferior part of the hyoid bone are absent at birth, which embryonic structure was affected? A. maxillary prominence B. mandibular prominence C. second pharyngeal arch D. third pharyngeal arch E. fourth pharyngeal arch ASSIGN THE FOLLOWING ADULT STRUCTURES TO THE EMBRYONIC STRUCTURE FROM WHICH IT DEVELOPS. ONE ANSWER PER QUESTION. ANSWERS MAY BE USED MORE THAN ONCE. 22. cheeks A. frontonasal prominence B. medial nasal prominence 23. primary palate C. lateral nasal prominence D. maxillary prominence 24. philtrum of upper lip E. mandibular prominence 25. alae of nose 26. Which of the following pharyngeal arch/nerve pairs is incorrect? A. arch 3/glossopharyngeal B. arch 1/trigeminal C. arch 4/superior laryngeal D. arch 2/hypoglossal E. arch 6/recurrent laryngeal 27. The relatively small size of the face of the newborn is due to: A. underdeveloped mandible B. unerupted teeth C. underdeveloped paranasal sinuses D. A and B E. A, B and C 28. General sensory information from the anterior two-thirds of the tongue is carried by a branch of the _____________ nerve. A. trigeminal B. facial C. vagus D. glossopharyngeal E. hypoglossal 29. The most common site of a branchial fistula is the: A. dorsal aspect of the neck. B. anterior border of the sternocleidomastoid muscle. C. superior mediastinum. D. midline close to the hyoid bone. E. base of the tongue. embryology exam II, form A, page 3, questions 21-29 30. The intermaxillary segment of the upper jaw is formed when the maxillary prominences merge with each other. A. true B. false 31. The lower lip develops from arch one. A. true 32. B. false An infant is diagnosed with an anterior cleft palate. This defect is located anterior to the foramen cecum. A. true B. false MATCH THE FOLLOWING WITH THE FIGURE AT THE RIGHT. ONE ANSWER PER QUESTION. ANSWERS MAY BE USED MORE THAN ONCE. 33. Becomes the tract of the optic nerve. 34. Frequent site of retinal detachment. 35. Derived entirely from surface ectoderm. 36. Forms the neural layer of the retina. 37. Becomes the pigmented layer of the retina MATCH THE FOLLOWING WITH THE FIGURE AT THE RIGHT. ONE ANSWER PER QUESTION. ANSWERS MAY BE USED MORE THAN ONCE. 38. Gives rise to the utricle 39. External acoustic meatus 40. Derived from tubotympanic recess 41. Meatal plug 42. Membranous labyrinth 43. The hypobranchial eminence contributes to the formation of the posterior part of the tongue. A. true B. false 44. A branchial cyst is a remnant of the thyroglossal duct. A. true B. false embryology exam II, form A, page 4, questions 30-44 45. The thyroid gland is derived from arch: A. one B. two C. three D. four E. none of the above 46. Neural crest cells contribute to the formation of the: A. facial bones B. sclera of the eye C. otic vesicle of the ear D. A and B E. A, B, and C END OF EXAM embryology exam II, form A, page 5, questions 44-46