Muscular System: Origin, Insertion, and Action

Question 1

origin: femur
insertion: tibia, fibula
action: flexion at knee, extension at hip

Answer 1

biceps femoris

Question 2

origin: ilium
insertion: tibia
action: flexion at knee

Answer 2

sartorius

Question 3

origin: ilium
insertion: iliotibial tract
action: flexion, adduction at hip

Answer 3

tensor fasciae latae

Question 4

origin: pubis
insertion: tibia
action: flexion at knee, adduction at hip

Answer 4

gracilis

Question 5

origin: ilium, sacrum, coccyx
insertion: femur
action: extension at hip

Answer 5

gluteus maximus

Question 6

origin: humerus
insertion: metacarpal bones
action: extension and abduction at wrist

Answer 6

extensor carpi radialis

Question 7

origin: ribs, sternum, clavicle
insertion: humerus
action: flexion, adduction of shoulder

Answer 7

pectoralis major

Question 8

origin: clavicle, scapula
insertion: humerus
action: abduction of shoulder

Answer 8

deltoid

Question 9

origin: occipital bone, thoracic vertebrae
insertion: clavicle, scapula
action: elevate, adduct, depress, rotate scapula

Answer 9

trapezius

Question 10

origin: ribs
insertion: scapula
action: protracts shoulders

Answer 10

serratus anterior

Question 11

origin: pubis
insertion: costal cartilages, xiphoid process
action: depresses ribs

Answer 11

rectus abdominis

Question 12

origin: cartilage of ribs, ilium
insertion: linea alba, pubis
action: compresses abdomen

Answer 12

transversus abdominis

Question 13

origin: ilium
insertion: ribs, xiphoid process, linea alba
action: compresses abdomen

Answer 13

internal oblique

Question 14

origin: ribs
insertion: ribs
action: depresses ribs

Answer 14

internal intercostals

Question 15

origin: scapula
insertion: mandible, skin of cheek
action: tenses skin of cheek, depresses mandible

Answer 15

platysma

Question 16

origin: zygomatic arch
insertion: mandible
action: elevates mandible

Answer 16

masseter

Question 17

origin: humerus
insertion: radius
action: flexion at elbow

Answer 17

brachioradialis

Question 18

origin: ribs
insertion: ilium, linea alba
action: compresses abdomen

Answer 18

external oblique

Question 19

origin: xiphoid process, ribs, vertebrae
insertion: central tendinous sheet
action: expand thoracic cavity

Answer 19

diaphragm

Question 20

origin: ribs
insertion: ribs
action: elevates ribs

Answer 20

external intercostals

Question 21

origin: maxilla and mandible
insertion: lips
action: compresses, purses lips

Answer 21

orbicularis oris

Question 22

origin: tibia, fibula
insertion: metatarsal bones
action: eversion of foot

Answer 22

fibularis (peroneus) longus

Question 23

origin: tibia, fibula
insertion: calcaneus
action: plantar flexion at ankle

Answer 23

soleus

Question 24

origin: femur
insertion: calcaneus
action: plantar flexion at ankle

Answer 24

gastrocnemius

Question 25

origin: fibula
insertion: big toe
action: flexion of big toe

Answer 25

flexor hallicus longus

Question 26

origin: tibia
insertion: phalanges
action: flexion of toes 2-5

Answer 26

flexor digitorum longus

Question 27

origin: fibula
insertion: big toe
action: extension of big toe

Answer 27

extensor hallicus longus

Question 28

origin: tibia, fibula
insertion: phalanges
action: extension of toes 2-5

Answer 28

extensor digitorum longus

Question 29

origin: tibia
insertion: metatarsal bone
action: dorsiflexion at ankle

Answer 29

tibialis anterior

Question 30

origin: femur
insertion: tibia
action: extension at knee

Answer 30

vastus intermedius
vastus lateralis
vastus medialis

Question 31

origin: ilium
insertion: tibia
action: extension at knee

Answer 31

rectus femoris

Question 32

origin: ischium
insertion: tibia
action: flexion at knee

Answer 32

semimembranosus
semitendinosus

Question 33

origin: ribs
insertion: ribs
action: depresses ribs

Answer 33

internal intercostals

Question 34

origin: humerus, ulna, radius
insertion: phalanges
action: flexion at finger

Answer 34

flexor digitorum

Question 35

origin: humerus
insertion: phalanges
action: extension at finger

Answer 35

extensor digitorum

Question 36

origin: humerus, ulna
insertion: metacarpal bones
action: extension and adduction at wrist

Answer 36

extensor carpi ulnaris

Question 37

origin: humerus
insertion: tendinous sheet in palm
action: flexion at wrist

Answer 37

palmaris longus

Question 38

origin: humerus, ulna
insertion: carpals
action:flexion and adduction at wrist

Answer 38

flexor carpi ulnaris

Question 39

origin: humerus
insertion: metacarpal bones
action: flexion and abduction at wrist

Answer 39

flexor carpi radialis

Question 40

origin: scapula, humerus
insertion: ulna
action: extension at elbow

Answer 40

triceps brachii

Question 41

origin: scapula
insertion: radius
action: flexion at shoulder and elbow

Answer 41

biceps brachii

Question 42

origin: thoracic and lumbar vertebras, ribs
insertion: humerus
action: extension, adduction of shoulder

Answer 42

latissmus dorsi

Question 43

origin: sternum, clavicle
insertion: skull(mastoid region)
action: flexes neck

Answer 43

sternocleidomastoid

Question 44

origin: maxilla and mandible
insertion: blends into ocularis oris
action: compresses cheeks

Answer 44

buccinator

Question 45

origin: zygomatic
insertion: mouth, upper lip
action: draws corners of the mouth back and up

Answer 45

zygomaticus

Question 46

origin: orbit
insertion: skin around eyelids
action: closes eyes

Answer 46

orbicularis oculi