Which one of these muscles helps to open the mouth (depress the mandible)?
A) Zygomaticus major
B) Digastric
C) Sternohyoid
D) Depressor anguli oris
E) Hyoglossus

Question

Quizplus · Accepted Answer

The digastric muscle helps to depress the mandible and open the mouth. The zygomaticus major muscle is responsible for elevating the corner of the mouth, the sternohyoid muscle depresses the hyoid bone, the depressor anguli oris muscle depresses the angle of the mouth, and the hyoglossus muscle helps to retract and depress the tongue.

Which One of These Muscles Helps to Open the Mouth