Perform the Indicated Operations

question 220

Multiple Choice

Perform the indicated operations.

---

Definitions:

Orbicularis Oculi

A facial muscle that encircles the eye socket and is responsible for closing the eyelids.

Orbicularis Oris

A complex of muscles in the lips that encircles the mouth, involved in controlling movements of the mouth and lips.

Frontalis

A facial muscle that lifts the eyebrows and causes wrinkles on the forehead, being part of the occipitofrontalis muscle.

Zygomaticus

A muscle of the face, which draws the angle of the mouth superiorly and posteriorly to allow for smiling.