Final answer:
The buccinator muscle is the exception and does not act on the mandible, unlike the other listed muscles.
Explanation:
The buccinator muscle is the muscle that will not act on the mandible. The lateral pterygoid, medial pterygoid, masseter, and temporalis muscles are all involved in jaw movement and mastication.
Learn more about muscles of mastication here:
https://brainly.com/question/30781041
