Which of the Following Muscles Listed Below Does NOT Serve

Question

Which of the following muscles listed below does NOT serve to elevate the upper lip?
A)Levator anguli oris muscle
B)Levator labii superioris alaeque nasi muscle
C)Risorius muscle
D)Zygomaticus major muscle

Accepted Answer

The Risorius muscle serves to pull the corner of the mouth laterally, but does not elevate the upper lip. The Levator anguli oris muscle, Levator labii superioris alaeque nasi muscle, and Zygomaticus major muscle all contribute to the elevation of the upper lip.