Bio 201 Exam 3 Study Guide UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Occipitofrontalis (frontal belly) - CORRECT ANSWER - elevates eyebrows and wrinkles
forehead for expressions
innervation: facial nerve
Levator palpebrae superioris - CORRECT ANSWER - elevates upper eyelid
innervation: oculomotor nerve
levator labii superioris - CORRECT ANSWER - elevates upper lip
innervation: facial nerve
Levator anguil oris - CORRECT ANSWER - elevates angle of mouth as in smiling
innervation: facial nerve
zygomaticus major - CORRECT ANSWER - draws angle of mouth superiorly and
laterally as in laughing
Innervation: facial nerve
depressor labii inferioris - CORRECT ANSWER - draws lower lip downward and laterally
in chewing
Innervation: facial nerve
nasalis - CORRECT ANSWER - flares nostrils
innervation: facial nerve
,risorius - CORRECT ANSWER - Draws corner of mouth laterally in laughing
innervation: facial nerve
platysma - CORRECT ANSWER - Draws down the lower lip and angles of the mouth;
tenses skin of the neck; helps depress mandible
Innervation: facial nerve
orbicularis oris - CORRECT ANSWER - encircles mouth, closes lip
innervation: facial nerve
orbicularis oculi - CORRECT ANSWER - Closes eyelids; used in blinking, winking, and
squinting
Innervation: facial nerve
depressor anguli oris - CORRECT ANSWER - draws angle of mouth laterally and
downward in sad expressions
innervation: facial nerve
mentalis - CORRECT ANSWER - Elevates and protrudes lower lip in drinking and
wrinkles skin of chin
Innervation: Facial nerve
corrugator supercilii - CORRECT ANSWER - draws eyebrows medially and inferiorly,
reduces glare of sunlight
Innervation: Facial Nerve
Genioglossus - CORRECT ANSWER - unilateral action draws tongue to one side;
bilateral action depresses midline of tongue or protrudes tongue
Innervation: Hypoglossal nerve
, Hyoglossus - CORRECT ANSWER - depresses tongue
Innervation: Hypoglossal nerve
Styloglossus - CORRECT ANSWER - draws tongue upward and posteriorly
Innervation: Hypoglossal nerve
Palatoglossus - CORRECT ANSWER - elevates posterior part of tongue
Innervation: Accessory and vagus nerves
Temporalis - CORRECT ANSWER - elevates and retracts mandible
Innervation: trigeminal nerve
Masseter - CORRECT ANSWER - elevates and retracts mandible with smaller roles in
protraction
Innervation: Trigeminal nerve
Medial Pterygoid - CORRECT ANSWER - elevates mandible and moves it from side to
side
Innervation: Trigeminal nerve
Lateral Pterygoid - CORRECT ANSWER - Depresses and protracts mandible and moves
it from side to side
Innervation: Trigeminal nerve
Buccinator - CORRECT ANSWER - compresses cheek, holds food between teeth during
chewing
Innervation: facial nerve
ACTUAL Exam Questions and CORRECT
Answers
Occipitofrontalis (frontal belly) - CORRECT ANSWER - elevates eyebrows and wrinkles
forehead for expressions
innervation: facial nerve
Levator palpebrae superioris - CORRECT ANSWER - elevates upper eyelid
innervation: oculomotor nerve
levator labii superioris - CORRECT ANSWER - elevates upper lip
innervation: facial nerve
Levator anguil oris - CORRECT ANSWER - elevates angle of mouth as in smiling
innervation: facial nerve
zygomaticus major - CORRECT ANSWER - draws angle of mouth superiorly and
laterally as in laughing
Innervation: facial nerve
depressor labii inferioris - CORRECT ANSWER - draws lower lip downward and laterally
in chewing
Innervation: facial nerve
nasalis - CORRECT ANSWER - flares nostrils
innervation: facial nerve
,risorius - CORRECT ANSWER - Draws corner of mouth laterally in laughing
innervation: facial nerve
platysma - CORRECT ANSWER - Draws down the lower lip and angles of the mouth;
tenses skin of the neck; helps depress mandible
Innervation: facial nerve
orbicularis oris - CORRECT ANSWER - encircles mouth, closes lip
innervation: facial nerve
orbicularis oculi - CORRECT ANSWER - Closes eyelids; used in blinking, winking, and
squinting
Innervation: facial nerve
depressor anguli oris - CORRECT ANSWER - draws angle of mouth laterally and
downward in sad expressions
innervation: facial nerve
mentalis - CORRECT ANSWER - Elevates and protrudes lower lip in drinking and
wrinkles skin of chin
Innervation: Facial nerve
corrugator supercilii - CORRECT ANSWER - draws eyebrows medially and inferiorly,
reduces glare of sunlight
Innervation: Facial Nerve
Genioglossus - CORRECT ANSWER - unilateral action draws tongue to one side;
bilateral action depresses midline of tongue or protrudes tongue
Innervation: Hypoglossal nerve
, Hyoglossus - CORRECT ANSWER - depresses tongue
Innervation: Hypoglossal nerve
Styloglossus - CORRECT ANSWER - draws tongue upward and posteriorly
Innervation: Hypoglossal nerve
Palatoglossus - CORRECT ANSWER - elevates posterior part of tongue
Innervation: Accessory and vagus nerves
Temporalis - CORRECT ANSWER - elevates and retracts mandible
Innervation: trigeminal nerve
Masseter - CORRECT ANSWER - elevates and retracts mandible with smaller roles in
protraction
Innervation: Trigeminal nerve
Medial Pterygoid - CORRECT ANSWER - elevates mandible and moves it from side to
side
Innervation: Trigeminal nerve
Lateral Pterygoid - CORRECT ANSWER - Depresses and protracts mandible and moves
it from side to side
Innervation: Trigeminal nerve
Buccinator - CORRECT ANSWER - compresses cheek, holds food between teeth during
chewing
Innervation: facial nerve
