Multiple Choice
How do the muscular and skeletal systems work together to facilitate movement in the body?
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9. Muscle Tissue
Introduction to Muscles and Muscle Tissue
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Which of the following muscles raises the upper lip?
A
Buccinator
B
Levator labii superioris
C
Orbicularis oris
D
Masseter
Verified step by step guidance1
Identify the function of each muscle listed in the options. The buccinator is primarily involved in compressing the cheek, the orbicularis oris is responsible for closing the lips, and the masseter is a major muscle involved in chewing.
Understand the anatomical location and function of the levator labii superioris. This muscle is located in the facial region and is responsible for elevating the upper lip.
Compare the functions of the listed muscles with the action described in the question, which is raising the upper lip.
Recognize that the levator labii superioris is specifically named for its action (levator means 'to lift' and labii superioris refers to the 'upper lip'), making it the correct choice for raising the upper lip.
Conclude that the levator labii superioris is the muscle that raises the upper lip, based on its anatomical function and location.
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