DE Anatomy: muscular system

Question 1

the name means “straight muscle of the abdomen”

Answer 1

rectus abdominis

Question 2

prime mover for shoulder flexion and adduction

Answer 2

pectoralis major

Question 3

prime mover for shoulder abduction

Answer 3

deltoid

Question 4

part of the abdominal girdle; forms the external lateral walls of the abdomen

Answer 4

external oblique

Question 5

acting alone, each muscle of this pair turns the head toward the opposite shoulder

Answer 5

sternocleidomastoid

Question 6

besides the two abdominal muscles (pairs) named above, two muscle pairs that help form the natural abdominal girdle

Answer 6

internal oblique and transversus abdominis

Question 7

deep muscles of the thorax that promote the inspiratory phase of breathing

Answer 7

external intercostal

Question 8

an unpaired muscle that acts with the muscles named immediately above to accomplish inspiration

Answer 8

diaphragm

Question 9

muscle that allows you to shrug your shoulders or extend your head

Answer 9

trapezius

Question 10

muscle that adducts the shoulder and causes extension of the shoulder joint

Answer 10

latissmus dorsi

Question 11

shoulder muscle that is the antagonist of the muscle just described

Answer 11

deltoid

Question 12

prime mover of back extension; a deep composite muscle consisting of three columns

Answer 12

erector spinae

Question 13

large paired superficial muscle of the lower back

Answer 13

latissimus dorsi

Question 14

fleshy muscle forming part of the posterior abdominal wall that helps maintain upright posture

Answer 14

quadratus lumborum

Question 15

hip flexor, deep in pelvis; a composite of two muscles

Answer 15

iliopsoas

Question 16

used to extend the hip when climbing stairs

Answer 16

gluteus maximus

Question 17

“toe dancer’s” muscle; a two-bellied muscle of the calf

Answer 17

gastrocnemeus

Question 18

inverts and dorsiflexes the foot

Answer 18

tibialis anterior

Question 19

muscle group that allows you to draw your legs to the midline of your body, as when standing at attention

Answer 19

adductors

Question 20

muscle group that extends the knee

Answer 20

quadriceps

Question 21

muscle group that extends the thigh and flexes the knee

Answer 21

hamstrings

Question 22

smaller hip muscle commonly used as an injection site

Answer 22

gluteus medius

Question 23

muscle group of the lateral leg; plantar flex and evert the foot

Answer 23

fibularis muscles

Question 24

strap like muscle that is a weak thigh flexor; the “tailor’s muscle”

Answer 24

sartorius

Question 25

like the two bellied muscle that lies over it, this muscle is a plantar flexor

Answer 25

soleus

Question 26

wrist flexor that follows the ulna

Answer 26

flexor carpi ulnaris

Question 27

muscle that extends the fingers

Answer 27

extensor digitorum

Question 28

muscle that flexes the fingers

Answer 28

flexor digitorum superficialis

Question 29

muscle that allows you to bend (flex) the elbow

Answer 29

biceps brachii

Question 30

muscles that extend the elbow

Answer 30

triceps brachii

Question 31

powerful shoulder abductor, used to raise the arm overhead

Answer 31

deltoid