, C H A P T E R 1
Development of the Head
and Neck
Multiple Choice
1. Which germ layer does NOT form the head and neck of the developing embryo?
a. Ectoderm.
b. Endoderm.
c. Mesoderm.
d. Neural crest.
2. The pharyngeal arches start forming during which week of development?
a. 1st.
b. 2nd.
c. 3rd.
d. 4th.
3. Pharyngeal pouches arise from which germ layer?
a. Ectoderm.
b. Endoderm.
c. Paraxial mesoderm.
d. Intermediate mesoderm.
4. The external surface of the pharyngeal arches is composed of which germ layer?
a. Ectoderm.
b. Endoderm.
c. Neural crest cells.
d. Lateral plate mesoderm.
5. Which germ layer makes up the internal surface of the pharyngeal arches?
a. Ectoderm.
b. Endoderm.
c. Neural crest.
d. Mesoderm.
6. Skeletal components develop from which tissue?
a. Neural crest.
b. Paraxial mesoderm.
c. Ectodermal placodes.
d. Lateral plate mesoderm.
1
,2 1—DEVELOPMENT OF THE HEAD AND NECK
7. Muscular structures develop from which germ layer?
a. Endoderm.
b. Mesoderm.
c. Neural crest.
d. Neuroectoderm.
8. The trigeminal nerve (V) innervates which pharyngeal arch?
a. 1.
b. 2.
c. 3.
d. 4.
9. Which is the third division (V3) of the trigeminal nerve?
a. Ciliary.
b. Maxillary.
c. Mandibular.
d. Ophthalmic.
10. Which pharyngeal arch regresses after initial development?
a. 1.
b. 2.
c. 4.
d. 5.
11. Each pharyngeal membrane is located between a pharyngeal pouch and which structure?
a. Pharyngeal arch.
b. Pharyngeal cleft.
c. Tubotympanic recess.
d. Primitive palatine tonsils.
12. The internal lining of the pharyngeal membranes is composed of
a. endoderm.
b. mesoderm.
c. neural crest cells.
d. ectomesenchyme.
13. The 2nd pharyngeal pouch forms which structure?
a. Tonsillar fossa.
b. Superior parathyroid gland.
c. Epithelium of the auditory tube.
d. Epithelium of the tympanic cavity.
14. The 2nd pharyngeal cleft is located between which two pharyngeal arches?
a. 1st and 2nd.
b. 2nd and 3rd.
c. 3rd and 4th.
d. 4th and 6th.
, 1—DEVELOPMENT OF THE HEAD AND NECK 3
15. Viscerocranium skull development describes the formation of the
a. facial bones.
b. frontal bone.
c. bones of the cranial base.
d. bones of the cranial vault.
16. Which structure is NOT part of the maxillary process?
a. Vomer.
b. Maxilla.
c. Malleus.
d. Palatine.
17. Which structure is not ossified?
a. Incus.
b. Malleus.
c. Inferior nasal concha.
d. Sphenomandibular ligament.
18. Which structure does NOT originate from the 2nd pharyngeal arch?
a. Stapes.
b. Maxilla.
c. Styloid process.
d. Stylohyoid ligament.
19. The earliest the posterior fontanelle might close is at which time?
a. 1 month.
b. 3 months.
c. 4 months.
d. 12 months.
20. Which structure is formed by the membranous neurocranium?
a. Ethmoid.
b. Frontal bone.
c. Petrous portion of the Temporal bone.
d. Sphenoid.
21. Each prominence surrounds the stomodeum to form the face, EXCEPT one. Which is the
EXCEPTION?
a. Maxillary.
b. Mandibular.
c. Frontonasal.
d. Lateral nasal.
22. The lower lip develops from which prominence?
a. Maxillary.
b. Mandibular.
c. Frontonasal.
d. Medial nasal.
Development of the Head
and Neck
Multiple Choice
1. Which germ layer does NOT form the head and neck of the developing embryo?
a. Ectoderm.
b. Endoderm.
c. Mesoderm.
d. Neural crest.
2. The pharyngeal arches start forming during which week of development?
a. 1st.
b. 2nd.
c. 3rd.
d. 4th.
3. Pharyngeal pouches arise from which germ layer?
a. Ectoderm.
b. Endoderm.
c. Paraxial mesoderm.
d. Intermediate mesoderm.
4. The external surface of the pharyngeal arches is composed of which germ layer?
a. Ectoderm.
b. Endoderm.
c. Neural crest cells.
d. Lateral plate mesoderm.
5. Which germ layer makes up the internal surface of the pharyngeal arches?
a. Ectoderm.
b. Endoderm.
c. Neural crest.
d. Mesoderm.
6. Skeletal components develop from which tissue?
a. Neural crest.
b. Paraxial mesoderm.
c. Ectodermal placodes.
d. Lateral plate mesoderm.
1
,2 1—DEVELOPMENT OF THE HEAD AND NECK
7. Muscular structures develop from which germ layer?
a. Endoderm.
b. Mesoderm.
c. Neural crest.
d. Neuroectoderm.
8. The trigeminal nerve (V) innervates which pharyngeal arch?
a. 1.
b. 2.
c. 3.
d. 4.
9. Which is the third division (V3) of the trigeminal nerve?
a. Ciliary.
b. Maxillary.
c. Mandibular.
d. Ophthalmic.
10. Which pharyngeal arch regresses after initial development?
a. 1.
b. 2.
c. 4.
d. 5.
11. Each pharyngeal membrane is located between a pharyngeal pouch and which structure?
a. Pharyngeal arch.
b. Pharyngeal cleft.
c. Tubotympanic recess.
d. Primitive palatine tonsils.
12. The internal lining of the pharyngeal membranes is composed of
a. endoderm.
b. mesoderm.
c. neural crest cells.
d. ectomesenchyme.
13. The 2nd pharyngeal pouch forms which structure?
a. Tonsillar fossa.
b. Superior parathyroid gland.
c. Epithelium of the auditory tube.
d. Epithelium of the tympanic cavity.
14. The 2nd pharyngeal cleft is located between which two pharyngeal arches?
a. 1st and 2nd.
b. 2nd and 3rd.
c. 3rd and 4th.
d. 4th and 6th.
, 1—DEVELOPMENT OF THE HEAD AND NECK 3
15. Viscerocranium skull development describes the formation of the
a. facial bones.
b. frontal bone.
c. bones of the cranial base.
d. bones of the cranial vault.
16. Which structure is NOT part of the maxillary process?
a. Vomer.
b. Maxilla.
c. Malleus.
d. Palatine.
17. Which structure is not ossified?
a. Incus.
b. Malleus.
c. Inferior nasal concha.
d. Sphenomandibular ligament.
18. Which structure does NOT originate from the 2nd pharyngeal arch?
a. Stapes.
b. Maxilla.
c. Styloid process.
d. Stylohyoid ligament.
19. The earliest the posterior fontanelle might close is at which time?
a. 1 month.
b. 3 months.
c. 4 months.
d. 12 months.
20. Which structure is formed by the membranous neurocranium?
a. Ethmoid.
b. Frontal bone.
c. Petrous portion of the Temporal bone.
d. Sphenoid.
21. Each prominence surrounds the stomodeum to form the face, EXCEPT one. Which is the
EXCEPTION?
a. Maxillary.
b. Mandibular.
c. Frontonasal.
d. Lateral nasal.
22. The lower lip develops from which prominence?
a. Maxillary.
b. Mandibular.
c. Frontonasal.
d. Medial nasal.
