A nursing infant develops a powerful sucking muscle that inserts to the muscle which adults also use for whistling (orbicularis oris). What is this muscle called?
A) zygomaticus
B) buccinator
C) platysma
D) masseter

Question

Quizplus · Accepted Answer

The muscle that inserts into the orbicularis oris and is used for sucking is the buccinator muscle. The zygomaticus muscle is involved in smiling, the platysma muscle is involved in facial expression and neck movements, and the masseter muscle is involved in chewing.

A Nursing Infant Develops a Powerful Sucking Muscle That Inserts