Deck 5: Orofacial Development

Question 1

Which paired processes fuse to form the intermaxillary segment internally within the embryo during prenatal development?

A) Lateral nasal processes
B) Medial nasal processes
C) Palatal shelves
D) Mandibular processes

Answer 1

Medial nasal processes

Question 2

When is the palate formed during prenatal development?

A) During the fourth week of prenatal development
B) After adjacent tongue formation begins
C) During only a week of prenatal development
D) Spanning both the embryonic and fetal periods

Answer 2

Spanning both the embryonic and fetal periods

Question 3

The _____ is a superficial demarcation of the line of fusion of the two lateral lingual swellings during tongue development,as well as that of a deeper fibrous structure.

A) tuberculum impar
B) copula
C) median lingual sulcus
D) sulcus terminalis

Answer 3

median lingual sulcus

Question 4

When does tongue development occur during prenatal development?

A) During the fourth to fifth week
B) During the fourth to eighth week
C) During the eighth to tenth week
D) During the eighth to twelfth week

Question 5

The tongue develops from multiple swellings derived from the:

A) outer parts of the maxillary process.
B) inferior growth of the intermaxillary segment.
C) palatal shelves of the maxillary process.
D) first four branchial arches.

Question 6

During which week of prenatal development is the palate completed?

A) Fifth
B) Eighth
C) Tenth
D) Twelfth

Question 7

Which of the following statements concerning tongue disturbances is correct?

A) Abnormalities of the tongue are common.
B) Ankyloglossia results from a long attachment of the lingual frenum.
C) Ankyloglossia may be associated with other craniofacial abnormalities.
D) Lingual frenum is never surgically cut anymore to free it.

Question 8

Considering the developmental disturbance of cleft palate,which of the following statements is correct?

A) May be isolated or associated with other abnormalities.
B) Isolated forms of cleft palate are more common than cleft lip.
C) Isolated forms are more common in males.
D) Cleft uvula is the most complicated example.

Question 9

During tongue development,what does the epiglottic swelling develop from?

A) Outer parts of the maxillary process
B) Inferior growth of the intermaxillary segment
C) Palatal shelves of the maxillary process
D) First four branchial arches

Question 10

Which of the following statements concerning tongue development is correct?

A) Tongue development begins as a triangular median swelling, the tuberculum impar.
B) The copula is formed from the fusion of mesenchyme of mainly the second parts of the fourth branchial arches.
C) The foramen cecum is the beginning of the thymus.
D) The tongue develops during the eighth week of prenatal development.

Question 11

The fusion of the two palatal shelves with the primary palate is dependent on the:

A) ingrowth from the maxillary arch.
B) change in position of the paranasal sinuses.
C) continued vertical growth of all the processes.
D) change in the position of the tongue.

Question 12

As the tongue develops still further,the copula of the tongue base,after overgrowing the second branchial arch,merges with the anterior swellings of the first branchial arch of the tongue body,with the fusion is superficially demarcated by the:

A) sulcus terminalis.
B) tuberculum impar.
C) copula.
D) median lingual sulcus.

Question 13

Which of the following statements concerning palatal developmental is correct?

A) The intermaxillary segment gives rise to the secondary palate.
B) Palatal fusion allows the fusion of swellings or tissue from different surfaces of the embryo.
C) The nasal cavity forms at later than the palate.
D) The secondary palate gives rise to the anterior third of the hard palate.

Question 14

The intermaxillary segment is an internal wedge-shaped mass that extends inferiorly and deep to the nasal pits on the:

A) inside of the parotid salivary gland.
B) inside of the stomodeum.
C) wall of the pharynx.
D) wall of the maxillary sinus.

Question 15

What part of the final palate does the secondary palate give rise to?

A) Two-thirds of the hard palate
B) Entire hard palate
C) Only the soft palate region
D) Both the hard and soft palate

Question 16

Which of the following structures is initially formed during the fifth week of prenatal development?

A) Neural tube
B) Palatal processes
C) Mandibular arch
D) Intermaxillary segment

Question 17

Which teeth are associated with the further development of the primary palate?

A) Maxillary incisors
B) Mandibular incisors
C) Maxillary canines
D) Mandibular posterior teeth

Question 18

The small paired nasopalatine canals are represented in the mature hard palate by the:

A) median palatine raphe.
B) medial lingual sulcus.
C) incisive foramen.
D) palatal rugae.

Question 19

During the sixth week of prenatal development,within the embryonic period,the bilateral maxillary processes give rise to paired:

A) lateral nasal processes.
B) medial nasal processes.
C) palatal shelves.
D) mandibular processes.

Question 20

What structure partially separates the nasal and oral cavities in the fifth week of prenatal development?

A) Maxillary process
B) Primary palate
C) Final or definitive palate
D) Mandibular arch

Question 21

Which way does the sulcus terminalis point toward the oropharynx after tongue development?

A) Upward
B) Downward
C) Forward
D) Backward

Question 22

To complete the palate,in which direction does the involved structures gradually fuse?

A) Right to left
B) Left to right
C) Anterior to posterior
D) Posterior to anterior

Question 23

When does the nasal cavity form during prenatal development?

A) During the fourth to eighth week
B) During the fifth to ninth week
C) During the fourth to tenth week
D) During the fifth to twelfth week

Question 24

Around the lingual swellings,the cells degenerate,forming a sulcus,which frees the body of the tongue from the floor of the mouth,except for the attachment of the:

A) nasal septum.
B) tuberculum impar.
C) copula.
D) lingual frenum.

Question 25

Which of the following completions of development allows the paired nasal cavity and the single oral cavity in the fetus to become completely separate?

A) Tongue completion
B) Tongue and nasal septum completion
C) Nasal septum and final palate completion
D) Final palate completion