10.5 Muscle O/I/A

What is the action of the pectoralis major?

• extend and adduct humerus

• flexes elbow

• extends elbow

• rotates, adducts and flexes humerus

This muscle originates on our scapula and clavicle and abducts the arm.

What muscle is shown here?

• external oblique

• latissimus dorsi

• gluteus maximus

• rectus abdominis

What group of muscles extends the leg?

• adductor muscles

• hamstring muscles

• quadriceps muscles

What muscle allows our leg to make a figure 4?

• gastrocnemius

• tibialis anterior

• sartorius

• trapezius

Where does the gastrocnemius insert?

• calcaneus

• tibia

• femur

• first metatarsal

Where does the biceps brachii insert?

• scapula

• radius

• ischial tuberosity

• clavicle

Which muscle draws the head to one side and rotates the scapula?

• trapezius

• latissimus dorsi

• deltoid

• triceps brachii

What muscle is shown here?

• rectus abdominis

• internal obliques

• external obliques

What muscle originates on the sacrum and ilium, inserts on the femur, and extends the hip/thigh?

• hamstring muscles

• adductor muscles

• sartorius

• gluteus maximus