Question 1

The trigeminal nerve innervates the first pharyngeal arch.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following are involved in formation of the tongue (select all that apply) ?

Accepted Answer

A)   Lateral lingual swellings
B)   Tuberculum impar
C)   Fifth pharyngeal arch
D)   Copula
E)   Frontal prominenceF) A) and D)
G) A) and E)

Question 3

The buccopharyngeal membrane is significant to head and neck anatomy because when it breaks down at about 10 weeks, the connection between the oral cavity and the digestive tract is established.

Accepted Answer

A)   Both the statement and the reason are correct and related.
B)   Both the statement and the reason are correct but are NOT related.
C)   The statement is correct, but the reason is NOT correct.
D)   The statement is NOT correct, but the reason is correct.
E)   NEITHER the statement NOR the reason is correct.F) A) and D)
G) None of the above

Question 4

The midgut forms all of the following EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

A)   Small intestine
B)   Cecum
C)   Ascending colon
D)   Sigmoid colon
E)   Descending colonF) B) and C)
G) All of the above

Question 5

The time span from fertilization through two weeks of gestation is referred to as the period of the ovum. The embryonic period of the fetus occurs from the third through the ninth week of gestation.

Accepted Answer

A)   Both statements are true.
B)   The first statement is true; the second is false.
C)   The first statement is false; the second is true.
D)   Both statements are false.E) B) and C)
F) A) and D)

Question 6

In a pregnant woman, which of the following are known to increase risk for having a baby with a cleft lip or palate (select all that apply) ?

Accepted Answer

A)   Smoking and other forms of tobacco use
B)   Prescription medications
C)   Environmental pollutants
D)   Family history
E)   AlcoholF) Not of aboveG) A) and E)
H) C) and E)

Question 7

During formation of the upper lip, the lateral and medial nasal processes fuse.

Accepted Answer

A) True 
 B)False

Question 8

Each of the following is true of the buccopharyngeal membrane EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

A)   The buccopharyngeal membrane is the point where the foregut and stomodeum share a common wall.
B)   The buccopharyngeal membrane forms the descending and sigmoid colon.
C)   This membrane is found near the future site of both the palatine tonsils and the posterior portion of the tongue.
D)   The buccal pharyngeal membrane breaks down at about  4  1/24 {~~1 / 2}4  1/2  weeks. E) None of the above
F) A) and D)

Question 9

A unilateral cleft lip is the lack of connective tissue migration between one maxillary process and the fused medial nasal processes. A bilateral cleft lip is the lack of connective tissue migration between both maxillary processes and the fused medial nasal processes.

Accepted Answer

A)   Both statements are true.
B)   The first statement is true; the second is false.
C)   The first statement is false; the second is true.
D)   Both statements are false.E) None of the above
F) C) and D) A

Question 10

Six pharyngeal arches can be seen in a 3-week-old embryo.

Accepted Answer

A) True 
 B)False

Question 11

A cyst can form during the fusion of the palate. If the cyst develops along the fusion line of the two palatal shelves, it is known as a globulomaxillary cyst.

Accepted Answer

A)   Both statements are true.
B)   The first statement is true; the second is false.
C)   The first statement is false; the second is true.
D)   Both statements are false.E) All of the above
F) A) and D)

Question 12

By the end of the eleventh week the upper lip has formed because the two medial nasal processes have fused together.

Accepted Answer

A)   Both the statement and the reason are correct and related.
B)   Both the statement and the reason are correct but are NOT related.
C)   The statement is correct, but the reason is NOT correct.
D)   The statement is NOT correct, but the reason is correct.
E)   NEITHER the statement NOR the reason is correct.F) C) and D)
G) A) and D)

Question 13

The mandibular arch is divided into the maxillary and mandibular processes.

Accepted Answer

A) True 
 B)False

Question 14

Both the muscles of mastication and the muscles of facial expression are innervated by the fifth cranial nerve. The muscles of mastication arise from the first pharyngeal arch and the muscles of facial expression arise from the fifth cranial arch.

Accepted Answer

A)   Both statements are true.
B)   The first statement is true; the second is false.
C)   The first statement is false; the second is true.
D)   Both statements are false.E) B) and C)
F) C) and D) D

Question 15

A 3-week-old embryo is approximately 4 mm from the top of the head to the tail area. The buccopharyngeal membrane begins to develop at this time.

Accepted Answer

A)   Both statements are true.
B)   The first statement is true; the second is false.
C)   The first statement is false. the second is true.
D)   Both statements are false.E) A) and C)
F) B) and C)

Question 16

The foramen cecum is the point where the thyroid gland begins to develop. It is a small depression near the eustachian tube.

Accepted Answer

A)   Both statements are true.
B)   The first statement is true; the second is false.
C)   The first statement is false; the second is true.
D)   Both statements are false.E) A) and B)
F) C) and D) B

Question 17

The stomodeum forms the oral cavity and the oral pharynx.

Accepted Answer

A) True 
 B)False

Question 18

The embryonic heart is seen as a bulge because it develops in an extremely anterior position.

Accepted Answer

A)   Both the statement and the reason are correct and related.
B)   Both the statement and the reason are correct but are NOT related.
C)   The statement is correct, but the reason is NOT correct.
D)   The statement is NOT correct, but the reason is correct.
E)   NEITHER the statement NOR the reason is correct.F) None of the above
G) D) and E)

Question 19

Formation of a median palatine cyst occurs during migration of the palatal shelves because a few epithelial cells remain embedded in connective tissue and fail to fuse.

Accepted Answer

A)   Both the statement and the reason are correct and related.
B)   Both the statement and the reason are correct but are NOT related.
C)   The statement is correct, but the reason is NOT correct.
D)   The statement is NOT correct, but the reason is correct.
E)   NEITHER the statement NOR the reason is correct.F) A) and C)
G) None of the above

Question 20

Migration refers to

Accepted Answer

A)   Early tooth bud mesial drift
B)   Deepening of the nasal pits
C)   Increase in connective tissue of the upper lip
D)   Fusion of the medial nasal processE) None of the above
F) All of the above

Exam 18: Development of Orofacial Complex

The trigeminal nerve innervates the first pharyngeal arch.

Correct AnswerverifiedShow Answer

Which of the following are involved in formation of the tongue (select all that apply) ?

Correct AnswerverifiedShow Answer

The buccopharyngeal membrane is significant to head and neck anatomy because when it breaks down at about 10 weeks, the connection between the oral cavity and the digestive tract is established.

Correct AnswerverifiedShow Answer

The midgut forms all of the following EXCEPT one. Which one is the EXCEPTION?

Correct AnswerverifiedShow Answer

The time span from fertilization through two weeks of gestation is referred to as the period of the ovum. The embryonic period of the fetus occurs from the third through the ninth week of gestation.

Correct AnswerverifiedShow Answer

In a pregnant woman, which of the following are known to increase risk for having a baby with a cleft lip or palate (select all that apply) ?

Correct AnswerverifiedShow Answer

During formation of the upper lip, the lateral and medial nasal processes fuse.

Correct AnswerverifiedShow Answer

Each of the following is true of the buccopharyngeal membrane EXCEPT one. Which one is the EXCEPTION?

Correct AnswerverifiedShow Answer

A unilateral cleft lip is the lack of connective tissue migration between one maxillary process and the fused medial nasal processes. A bilateral cleft lip is the lack of connective tissue migration between both maxillary processes and the fused medial nasal processes.

Correct AnswerverifiedA

Six pharyngeal arches can be seen in a 3-week-old embryo.

Correct AnswerverifiedShow Answer

A cyst can form during the fusion of the palate. If the cyst develops along the fusion line of the two palatal shelves, it is known as a globulomaxillary cyst.

Correct AnswerverifiedShow Answer

By the end of the eleventh week the upper lip has formed because the two medial nasal processes have fused together.

Correct AnswerverifiedShow Answer

The mandibular arch is divided into the maxillary and mandibular processes.

Correct AnswerverifiedShow Answer

Both the muscles of mastication and the muscles of facial expression are innervated by the fifth cranial nerve. The muscles of mastication arise from the first pharyngeal arch and the muscles of facial expression arise from the fifth cranial arch.

Correct AnswerverifiedD

A 3-week-old embryo is approximately 4 mm from the top of the head to the tail area. The buccopharyngeal membrane begins to develop at this time.

Correct AnswerverifiedShow Answer

The foramen cecum is the point where the thyroid gland begins to develop. It is a small depression near the eustachian tube.

Correct AnswerverifiedB

The stomodeum forms the oral cavity and the oral pharynx.

Correct AnswerverifiedShow Answer

The embryonic heart is seen as a bulge because it develops in an extremely anterior position.

Correct AnswerverifiedShow Answer

Formation of a median palatine cyst occurs during migration of the palatal shelves because a few epithelial cells remain embedded in connective tissue and fail to fuse.

Correct AnswerverifiedShow Answer

Migration refers to

Correct AnswerverifiedShow Answer

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A

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B

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