Matching Parts of a Diagram

Identify the muscle shown in the diagram.

• Masseter

• Buccinator

• Orbicularis Oris

• Sternocleidomastoid

Which muscle is the prime mover in plantar flexion?

• tibialis anterior

• gastrocnemius

• soleus

• fibularis longus

Which muscle is the prime mover in flexion of the leg?

• quadriceps femoris

• hamstrings (biceps femoris, semitendinosus, semimembranosus)

• gluteus maximus

• adductor magnus

Which muscle is the prime mover in extension of the leg?

• hamstrings

• sartorius

• quadriceps femoris (rectus femoris, vastus lateralis, vastus medialis, vastus intermedius)

• gracilis

Which muscle is a prime mover in flexion of the arm?

• triceps brachii

• latissimus dorsi

• biceps brachii

• deltoid (anterior fibers)

Which muscle is a prime mover in extension of the arm?

• biceps brachii

• pectoralis major

• triceps brachii

• deltoid (anterior fibers)

Which muscle is the prime mover in shrugging your shoulders?

• levator scapulae

• rhomboids

• trapezius (superior fibers)

• serratus anterior

Which muscle is a prime mover in abduction of the arm?

• pectoralis major

• latissimus dorsi

• deltoid (middle fibers)

• teres major

Which of the following muscles would you be using the most when you are chewing a piece of gum?

• brachialis

• tibialis anterior

• masseter

• sternocleidomastoid

What primary muscle facilitates normal respiration (breathing)?

• rectus abdominus

• external oblique

• diaphragm

• internal intercostals