Embryology Multiple Choice Set 2

QUESTION 1

Ameloblasts enter their formative stage:
  1. Prior to dentin formation
  2. At the beginning of root formation
  3. When Hertwig's sheath is formed
  4. Prior to the reversal of functional polarity
  5. After the adjacent odontoblasts become differentiated

QUESTION 2

The root of the tongue is derived mainly from the fusion of the:
  1. Tuberculum impar and first branchial arch
  2. First and second branchial arches
  3. First branchial arches
  4. Second branchial arches
  5. Second and third branchial arches

QUESTION 3

The septum of the nose is formed from the:
  1. Mandibular processes
  2. Maxillary processes
  3. Lateral nasal processes
  4. Median nasal processes
  5. Frontonasal process

QUESTION 4

The mesoderm gives rise to which of the following dental components?
  1. Dental lamina
  2. Enamel spindle
  3. Stratum intermedium
  4. Epithelial rests
  5. Outer dental epithelium

QUESTION 5

Embryologically, nerve cells of the autonomic ganglia are derived from the:
  1. Ectoderm
  2. Ectoderm and mesoderm
  3. Mesoderm
  4. Endoderm
  5. Endoderm and mesoderm

QUESTION 6

The dorsal end of Meckel's cartilage becomes ossified to form the:
  1. Malleus, incus and stapes
  2. Mandible
  3. Incus and malleus
  4. Stapes and incus
  5. Styloid process of the temporal bone

QUESTION 7

The first branchial arch gives rise to one of the following muscles:
  1. Stapedius
  2. Stylohyoid
  3. Tensor tympani
  4. Posterior belly of digastric
  5. Buccinator

QUESTION 8

The ventral portion of Meckel's cartilage
  1. Forms the sphenomandibular ligament
  2. Gives rise to the incus and stapes
  3. Forms the stylohyoid ligament
  4. Usually disappears without a trace
  5. Gives rise to the incus and malleus
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