Muscular System

Question 1

Skeletal Muscle

Answer 1

fibers are multinucleated structures that compose the skeletal muscle.

Question 2

Smooth muscle

Answer 2

are called so because they do not have striations.

Question 3

Cardiac Muscle

Answer 3

are only found in the heart

Question 4

extensibility

Answer 4

they can be stretched

Question 5

elasticity

Answer 5

can return to normal length after stretching

Question 6

Fascicle

Answer 6

The muscle fibers that are arranged in bundles

Question 7

Epimysium

Answer 7

Outermost layer, surrounds entire muscle

Question 8

Periumysium

Answer 8

Separates and surrounds fascicles

Question 9

Endomysium

Answer 9

Surrounds each individual muscle fiber

Question 10

Sarcolemma

Answer 10

Muscle fiber membrane

Question 11

Myofibril

Answer 11

Individual parallel muscle fibers (made up of actin and myosin)

Question 12

Sarcoplasm

Answer 12

Inner material surrounding the myofibril (equivalent to the cell’s cytoplasm)

Question 13

Actin

Answer 13

Thin filaments

Question 14

Myosin

Answer 14

Thick filaments

Question 15

Subclavius

Answer 15

Depression, Stabilizes clavicle

Question 16

Serratus anterior

Answer 16

Scapula, protracts, ribs , elevates, moves arm from side of body to front of body

Question 17

Trapezius

Answer 17

Scapula, rotates inferiorly, retracts and elevates.

Question 18

Rhomboid major

Answer 18

Retracts rotates inferiorly, Stabilizes scapula

Question 19

pectoralis major

Answer 19

flexion, adduction, brings elbows together

Question 20

Latissimus dorsi

Answer 20

Humerus, extension adduction, moes elbows back

Question 21

Deltoid

Answer 21

Abduction flexion extension, Lifts arms at the shoulder

Question 22

Supraspinatus

Answer 22

Abduction, Rotates the elbows outwards

Question 23

Teres major

Answer 23

extension, adduction, Assists the infraspinatus in rotating the elbows outward.

Question 24

Biceps brachii

Answer 24

flexion, supination, performs a bicep curl

Question 25

Triceps brachii

Answer 25

extension, extends forearm, performing a punch

Question 26

Pronator teres

Answer 26

pronation, turns hand palm down

Question 27

Supinator

Answer 27

supination, turns hands palm up

Question 28

iliacus

Answer 28

thigh, flexion and lateral rotation, raises the knee at the hip

Question 29

gluteus maximus

Answer 29

extension, lowers the knee and moves the thigh back

Question 30

gluteus medius

Answer 30

abduction, opens the thigh

Question 31

gluteus minimus

Answer 31

abduction, brings the thighs back together

Question 32

adductor longus

Answer 32

adduction, flexion, brings the thighs back together

Question 33

rectus femoris

Answer 33

tibia/fibula, extension, moves the lower leg out in front of the body.

Question 34

biceps femoris

Answer 34

flexion, thigh extension, moves the back of the lower leg up towards the buttocks

Question 35

tibialis anterior

Answer 35

dorsiflexion, inversion, raises the sole of the foot off of the ground

Question 36

extensor hallucis longus

Answer 36

dorsiflexion, extension, raises the sole of the foot off of the ground

Question 37

extensor digitorum longus

Answer 37

dorsiflexion, extension, raises the sole of the foot off of the ground

Question 38

gastrocnemius

Answer 38

plantar flexion, flexion, lowers the sole of the foot to the ground.

Question 39

soleus

Answer 39

plantar flexion, similarly as you are jumping

Question 40

tibialis posterior

Answer 40

plantar flexion, lowers the sole of the foot to the ground

Question 41

flexor digitorum longus

Answer 41

plantar flexion, inversion, lowering the sole of the foot to the ground.

Question 42

flexor hallucis longus

Answer 42

flexion, flexes the big toe