Question 1

The cheeks are formed from which prominences?

Accepted Answer

A)   Frontal
B)   Lateral nasal
C)   Mandibular
D)   Maxillary
E)   Medial nasalF) A) and B)
G) A) and C)

Question 2

Both cleft lip and palate have a genetic component,which results in differences in the frequency of cleft lip and palate in females and males.Does cleft lip occur more often in females or males?

Accepted Answer

A)   Males
B)   FemalesC) A) and B)
D) undefined

Question 3

The muscles of mastication,excluding the tongue muscles,arise from the mesoderm of which structure(s) ?

Accepted Answer

A)   First pharyngeal arches
B)   Second pharyngeal arches
C)   Occipital somites
D)   Neural crest cells
E)   NotochordF) None of the above
G) B) and C)

Question 4

Van der Woude syndrome is predominantly characterized by which defect?

Accepted Answer

A)   Premature suture closure (i.e., craniosynostosis) 
B)   Defective outgrowth of the facial processes (i.e., cleft lip and palate) 
C)   Narrowing of the facial prominences (i.e., holoprosencephaly) 
D)   Failure of cranial neural tube closure (i.e., exencephaly) E) A) and B)
F) B) and C)

Question 5

At birth what is the approximate ratio of the facial skeleton to the cranial vault?

Accepted Answer

A)   1:3
B)   1:5
C)   1:7
D)   2:1
E)   2:3F) B) and D)
G) B) and C)

Question 6

Researchers have shown that the mandibular prominence can be transformed into the maxillary prominence by the genetic inactivation of two homeobox transcription factors in mice.What are these two factors?

Accepted Answer

A)   Msx1 and -2
B)   Barx1 and Msx1
C)   Dlx1 and -2
D)   Dlx5 and -6
E)   Dlx2 and -5F) None of the above
G) A) and B)

Question 7

Derivatives of the second pharyngeal arches are innervated by which nerves?

Accepted Answer

A)   Cervical spinal nerves
B)   Facial nerves
C)   Glossopharyngeal nerves
D)   Trigeminal nerves
E)   Vagus nervesF) A) and E)
G) All of the above

Question 8

The developing hindbrain is segmented into rhombomeres,which are characterized by the differential expression of members of the Hox family of transcription factors.Researchers have shown that some members of the Hox family are crucial for the specification of the rhombomeres.When Hoxa1 is genetically inactivated in mice,which rhombomeres are affected?

Accepted Answer

A)   r1 and r2
B)   r3 and r4
C)   r4 and r5
D)   r6 and r7E) B) and C)
F) A) and B)

Question 9

The third pharyngeal arch artery gives rise to which adult blood vessel(s) ?

Accepted Answer

A)   Internal and external carotids
B)   Common carotids and roots of internal carotids
C)   Corticotympanic artery
D)   Ductus arteriosus
E)   Initial sprouts of pulmonary arteriesF) B) and E)
G) B) and D)

Question 10

The muscles of facial expression arise from the mesoderm of which structure(s)

Accepted Answer

A)   First pharyngeal arches
B)   Second pharyngeal arches
C)   Occipital somites
D)   Neural crest cells
E)   NotochordF) B) and E)
G) B) and D)

Question 11

Neural crest cells migrate from the hindbrain in distinct streams.How many neural crest cells streams are there in the hindbrain?

Accepted Answer

A)   2
B)   3
C)   4
D)   5
E)   7F) B) and C)
G) A) and E)

Question 12

The stylopharyngeus muscle is innervated by which nerve?

Accepted Answer

A)   Trigeminal
B)   Vagus
C)   Facial
D)   Glossopharyngeal
E)   OculomotorF) A) and B)
G) B) and D)

Question 13

The mesoderm forms which derivative of the pharyngeal apparatus?

Accepted Answer

A)   Aortic arch muscle coats
B)   Cartilaginous bars
C)   Cranial nerves
D)   Muscle platesE) A) and B)
F) A) and C)

Question 14

A child is diagnosed with Treacher Collins syndrome,which results from a mutation in the gene TCOF1 encoding the protein TREACLE.What embryonic tissue is the most affected by this mutation?

Accepted Answer

A)   Endoderm
B)   Surface ectoderm
C)   Neural crest cells
D)   Mesoderm
E)   NotochordF) A) and E)
G) A) and D)

Question 15

The muscles of the larynx are derived from which pharyngeal arches?

Accepted Answer

A)   First
B)   Second
C)   Third only
D)   Fourth and sixth only
E)   Third, fourth, and sixthF) A) and B)
G) B) and D)

Exam 17: Development of the Pharyngeal Apparatus and Face

Neural crest cells migrate from the hindbrain in distinct streams.How many neural crest cells streams are there in the hindbrain?

Correct Answer
verified

The mesoderm forms which derivative of the pharyngeal apparatus?

Correct Answer
verified

A child is diagnosed with Treacher Collins syndrome,which results from a mutation in the gene TCOF1 encoding the protein TREACLE.What embryonic tissue is the most affected by this mutation?

Correct Answer
verified

Researchers have shown that the mandibular prominence can be transformed into the maxillary prominence by the genetic inactivation of two homeobox transcription factors in mice.What are these two factors?

Correct Answer
verified

The muscles of the larynx are derived from which pharyngeal arches?

Correct Answer
verified

Derivatives of the second pharyngeal arches are innervated by which nerves?

Correct Answer
verified

The cheeks are formed from which prominences?

Correct Answer
verified

The stylopharyngeus muscle is innervated by which nerve?

Correct Answer
verified

The muscles of facial expression arise from the mesoderm of which structure(s)

Correct Answer
verified

The third pharyngeal arch artery gives rise to which adult blood vessel(s) ?

Correct Answer
verified

At birth what is the approximate ratio of the facial skeleton to the cranial vault?

Correct Answer
verified

Van der Woude syndrome is predominantly characterized by which defect?

Correct Answer
verified

Both cleft lip and palate have a genetic component,which results in differences in the frequency of cleft lip and palate in females and males.Does cleft lip occur more often in females or males?

Correct Answer
verified

The muscles of mastication,excluding the tongue muscles,arise from the mesoderm of which structure(s) ?

Correct Answer
verified

Correct Answer
verified

Exam 17: Development of the Pharyngeal Apparatus and Face

Neural crest cells migrate from the hindbrain in distinct streams.How many neural crest cells streams are there in the hindbrain?

Correct AnswerverifiedShow Answer

The mesoderm forms which derivative of the pharyngeal apparatus?

Correct AnswerverifiedShow Answer

A child is diagnosed with Treacher Collins syndrome,which results from a mutation in the gene TCOF1 encoding the protein TREACLE.What embryonic tissue is the most affected by this mutation?

Correct AnswerverifiedShow Answer

Researchers have shown that the mandibular prominence can be transformed into the maxillary prominence by the genetic inactivation of two homeobox transcription factors in mice.What are these two factors?

Correct AnswerverifiedShow Answer

The muscles of the larynx are derived from which pharyngeal arches?

Correct AnswerverifiedShow Answer

Derivatives of the second pharyngeal arches are innervated by which nerves?

Correct AnswerverifiedShow Answer

The cheeks are formed from which prominences?

Correct AnswerverifiedShow Answer

The stylopharyngeus muscle is innervated by which nerve?

Correct AnswerverifiedShow Answer

The muscles of facial expression arise from the mesoderm of which structure(s)

Correct AnswerverifiedShow Answer

The third pharyngeal arch artery gives rise to which adult blood vessel(s) ?

Correct AnswerverifiedShow Answer

At birth what is the approximate ratio of the facial skeleton to the cranial vault?

Correct AnswerverifiedShow Answer

Van der Woude syndrome is predominantly characterized by which defect?

Correct AnswerverifiedShow Answer

Both cleft lip and palate have a genetic component,which results in differences in the frequency of cleft lip and palate in females and males.Does cleft lip occur more often in females or males?

Correct AnswerverifiedShow Answer

The muscles of mastication,excluding the tongue muscles,arise from the mesoderm of which structure(s) ?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
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