Louisiana Barber Practice Exam

The two muscles in the jaw involved in chewing are the masseter and temporalis. While the sternocleidomastoid and trapezius muscles are important for neck movement and stability, they are not directly involved in chewing. Similarly, the pectoralis major and deltoid muscles are important for movements at the shoulder, not the jaw. The biceps and triceps muscles are responsible for forearm movements, not chewing. Therefore, A is the best answer for the question.