The Muscular System

What is the action of the frontalis muscle in the epicranius?

• Raises the eyebrows

• Closes the eyes

• Compresses the cheeks

• Puckers the lips

Which muscle is responsible for forcing the lips closed and puckering them?

• Orbicularis oculi

• Buccinator

• Orbicularis oris

• Levator palpebrae superioris

What is the location of the levator palpebrae superioris muscle?

• Under the skin of the cheek

• Above the eye, attaching to the inside of the upper eyelid

• Around the mouth

• Entire superior aspect of the head

What action does the buccinator muscle perform?

• Raises the eyebrows

• Opens the eye

• Compresses "puffed-out" cheeks

• Forces the eye shut

Which muscle is described as a circular "orbit-like" muscle around the eye?

• Epicranius

• Orbicularis oculi

• Orbicularis oris

• Levator palpebrae superioris

Which muscle is known as the "smiling muscle" because it raises the corners of the mouth?

• Masseter

• Temporalis

• Zygomaticus Major/Minor

• Sternocleidomastoid

What is the primary action of the masseter muscle?

• Rotates the head

• Raises the mandible; powerful chewing muscle

• Fixes the shoulder/scapula

• Extends the arm

Where is the temporalis muscle located?

• Near the posterior cheek and mandible

• Over the temporal bone, inserted higher than the masseter

• From the zygomatic bone to the sides of the mouth

• Between the lateral portion of some ribs and the axillary region

What is the function of the sternocleidomastoid muscle?

• Raises the mandible

• Flexes the head and rotates it toward the opposite side

• Extends the arm

• Adducts the upper arm

Which muscle is described as a large, diamond-shaped muscle of the upper back?

• Serratus Anterior

• Latissimus Dorsi

• Trapezius

• Masseter