Question 1

Fibers of the mentalis muscle cross the midline.

Accepted Answer

A) True 
 B)False

Question 2

The muscle that originates from the pterygoid hamulus to the medial surface of the mandible at the posterior end of the mylohyoid line is the

Accepted Answer

A)   Buccinator
B)   Levator labii superioris
C)   Depressor labii inferioris
D)   Orbicularis orisE) B) and D)
F) All of the above

Question 3

Which muscle opens and closes the nostrils?

Accepted Answer

A)   Nasalis
B)   Naris
C)   Dilator naris
D)   Compressor narisE) None of the above
F) All of the above

Question 4

Which muscle plays a role in mastication?

Accepted Answer

A)   Buccinator
B)   Orbicularis oris
C)   Levator labii superioris
D)   Depressor labii inferiorisE) A) and C)
F) A) and B)

Question 5

Both the corrugator and the platysma pull the eyebrow up. The corrugator muscle has fibers that extend to the lateral part of the eyebrow whereas the procerus has fibers that extend to the medial end of the eyebrow.

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) B) and C)

Question 6

The facial nerve innervates the muscles of facial expression and mastication. The facial nerve is the fifth cranial nerve.

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) A) and C)

Question 7

The action of the orbicularis oris is to close and compress the lips.

Accepted Answer

A) True 
 B)False  True

Question 8

Fibers of the platysma run from the maxilla to just below the clavicle in a broad sheet.

Accepted Answer

A) True 
 B)False

Question 9

The muscles of the scalp move the scalp in a forward but not a backward movement.

Accepted Answer

A) True 
 B)False

Question 10

The orbicularis oris and orbicularis oculi circle the oral cavity. The muscles of the orbicularis oculi circle the lips like a purse string.

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 D)
F) B) and C)

Question 11

The posterior auricular muscle can raise the ear. Fibers of this poorly developed muscle run forward.

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) B) and D)

Question 12

The facial nerve innervates the muscles of facial expression and mastication. The facial nerve is the fifth cranial nerve.

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) C) and D)
F) A) and B)

Question 13

The muscles grouped around the mouth do not influence tooth alignment because abnormal pressures from one muscle group are balanced by muscles of other groups.

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 B)
G) A) and E)

Question 14

All of the muscles surrounding the oral cavity interlace with the orbicularis oris.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following are true of the buccinator muscle (select all that apply) ?

Accepted Answer

A)   It is probably the most important muscle of the mouth.
B)   It has no role in mastication.
C)   It originates from the pterygomandibular raphe.
D)   It originates from the buccal alveolar bone of the maxillary molars.
E)   It makes up the musculature of the cheek.F) All of the above
G) D) and E)

Question 16

The mentalis muscle fibers originate in the mental foramen. These fibers terminate by inserting into the skin of the chin.

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 D)
F) B) and C)

Question 17

The epicranius muscle is known by what other name?

Accepted Answer

A)   Anterior auricular
B)   Frontalis
C)   Occipitofrontalis
D)   PlatysmaE) A) and C)
F) B) and C) C

Question 18

Which of the following can be influenced by abnormal pressure from the muscles that surround the mouth (select all that apply) ?

Accepted Answer

A)   Mastication
B)   Facial expression
C)   Ability to close eyelids
D)   Raising the upper eyelid
E)   Speech patternsF) B) and E)
G) A) and D) A, B, E

Question 19

The orbicularis oris is probably the most important muscle of the mouth because in addition to its role in forming facial expressions, this muscle is also referred to as an accessory muscle of mastication.

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) A) and B)

Question 20

Which muscle originates from the lower rim of the orbit?

Accepted Answer

A)   Orbicularis oris
B)   Procerus
C)   Levator labii superioris
D)   Levator anguli orisE) None of the above
F) A) and D)

Exam 30: Muscles of Facial Expression

Fibers of the mentalis muscle cross the midline.

Correct AnswerverifiedShow Answer

The muscle that originates from the pterygoid hamulus to the medial surface of the mandible at the posterior end of the mylohyoid line is the

Correct AnswerverifiedShow Answer

Which muscle opens and closes the nostrils?

Correct AnswerverifiedShow Answer

Which muscle plays a role in mastication?

Correct AnswerverifiedShow Answer

Both the corrugator and the platysma pull the eyebrow up. The corrugator muscle has fibers that extend to the lateral part of the eyebrow whereas the procerus has fibers that extend to the medial end of the eyebrow.

Correct AnswerverifiedShow Answer

The facial nerve innervates the muscles of facial expression and mastication. The facial nerve is the fifth cranial nerve.

Correct AnswerverifiedShow Answer

The action of the orbicularis oris is to close and compress the lips.

Correct AnswerverifiedTrue

Fibers of the platysma run from the maxilla to just below the clavicle in a broad sheet.

Correct AnswerverifiedShow Answer

The muscles of the scalp move the scalp in a forward but not a backward movement.

Correct AnswerverifiedShow Answer

The orbicularis oris and orbicularis oculi circle the oral cavity. The muscles of the orbicularis oculi circle the lips like a purse string.

Correct AnswerverifiedShow Answer

The posterior auricular muscle can raise the ear. Fibers of this poorly developed muscle run forward.

Correct AnswerverifiedShow Answer

The facial nerve innervates the muscles of facial expression and mastication. The facial nerve is the fifth cranial nerve.

Correct AnswerverifiedShow Answer

The muscles grouped around the mouth do not influence tooth alignment because abnormal pressures from one muscle group are balanced by muscles of other groups.

Correct AnswerverifiedShow Answer

All of the muscles surrounding the oral cavity interlace with the orbicularis oris.

Correct AnswerverifiedShow Answer

Which of the following are true of the buccinator muscle (select all that apply) ?

Correct AnswerverifiedShow Answer

The mentalis muscle fibers originate in the mental foramen. These fibers terminate by inserting into the skin of the chin.

Correct AnswerverifiedShow Answer

The epicranius muscle is known by what other name?

Correct AnswerverifiedC

Which of the following can be influenced by abnormal pressure from the muscles that surround the mouth (select all that apply) ?

Correct AnswerverifiedA, B, E

The orbicularis oris is probably the most important muscle of the mouth because in addition to its role in forming facial expressions, this muscle is also referred to as an accessory muscle of mastication.

Correct AnswerverifiedShow Answer

Which muscle originates from the lower rim of the orbit?

Correct AnswerverifiedShow Answer

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True

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C

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A, B, E

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