BIO 2450 Lab Quiz 2

Frontalis

Raises eyebrows; wrinkles forehead

Occipitalis

Pulls scalp backward

Temporalis

Elevates mandible (closes jaw)

Orbicularis oculi

Closes eyes

Masseter

Elevates mandible (closes jaw)

Sternocleidomastoid

Flexes neck; rotates head

Orbicularis oris

Puckers lips

Buccinator

Compresses cheeks

Trapezius

Stabilizes scapula; rotates scapula

Rhomboid major

Retracts scapula

Serratus anterior

Protracts scapula

Pectoralis minor

Depresses scapula; protracts shoulder

Pectoralis major

Flexes arm; adducts arm

Deltoid

Flexes arm; abducts arm; extends arm

Latissimus dorsi

Adducts arm; extends arm; rotates arm

Supraspinatus

Abducts arm

Infraspinatus

Adducts arm; rotates arm

Teres minor

Adducts arm; extends arm; rotates arm

Teres major

Extends arm; adducts arm; rotates arm

Subscapularis

Rotates arm; stabilizes shoulder joint

Biceps brachii

Flexes elbow; supinates forearm

Brachialis

Flexes elbow

Triceps brachii

Extends elbow

Brachioradialis

Flexes elbow

Pronator teres

Pronates forearm

Extensor digitorum

Extends wrist; extends digits 2–5

Flexor carpi radialis

Flexes wrist; abducts hand

Flexor carpi ulnaris

Flexes wrist; adducts hand

Flexor digitorum profundus

Flexes wrist; flexes digits 2–5

Extensor carpi radialis longus

Extends wrist; abducts hand

Extensor carpi ulnaris

Extends wrist; adducts hand

Rectus abdominis

Flexes vertebral column; compresses abdomen

External oblique

Rotates vertebral column; compresses abdomen

Internal oblique

Flexes vertebral column; compresses abdomen

Transverse abdominis

Compresses abdomen

Diaphragm

Increases thoracic volume (inhalation)

Adductor magnus

Adducts thigh; extends thigh

Adductor longus

Adducts thigh; flexes thigh

Gluteus maximus

Extends thigh; rotates thigh

Tensor fasciae latae

Flexes thigh; abducts thigh

Gluteus medius

Abducts thigh; rotates thigh

Psoas major

Flexes thigh; rotates thigh

Iliacus

Flexes thigh; rotates thigh

Vastus lateralis

Extends leg

Vastus medialis

Extends leg

Vastus intermedius

Extends leg

Sartorius

Flexes leg; abducts thigh

Rectus femoris

Extends leg

Biceps femoris

Flexes leg; extends thigh

Semitendinosus

Flexes leg; extends thigh

Semimembranosus

Flexes leg; extends thigh

Gracilis

Flexes leg; adducts thigh

Gastrocnemius

Plantar flexes foot; flexes leg

Tibialis anterior

Dorsiflexes foot; inverts foot

Soleus

Plantar flexes foot