Muscular System

Question 1

skeletal muscle(voluntary)

Answer 1

fibers are multinucleated structures that compose the skeletal muscle- attached to bone

Question 2

excitability

Answer 2

able to send electrical waves along the entire length

Question 3

fascicle

Answer 3

the muscle fibers are arranged in bundles

Question 4

epimysium

Answer 4

outermost layer, surrounds entire muscle

Question 5

perimysium

Answer 5

separates and surrounds fascicles

Question 6

endomysium

Answer 6

surrounds each individual muscle fiber

Question 7

sarcolemma

Answer 7

muscle fiber membrane

Question 8

myofibril

Answer 8

individual parallel muscle fiber

Question 9

sarciplasm

Answer 9

inner material surrounding the myofibril

Question 10

actin

Answer 10

thin filaments

Question 11

myosin

Answer 11

thick filaments

Question 12

cardiac muscle (involuntary)

Answer 12

are only found in the heart

Question 13

smooth muscle (involuntary)

Answer 13

no striations. these can be found in hollow organs such as bladder, stomach, uterus, intestines, and passageways of circulatory system

Question 14

elasticability

Answer 14

having the ability to recoil back to its original length

Question 15

extensibility

Answer 15

allows muscles to stretch or extend

Question 16

contractibility

Answer 16

allows muscle to pull on its attachment and shorten

Question 17

subclavius

Answer 17

stabilizes clavicle during movement by depressing it, depression

Question 18

serratus anterior

Answer 18

moves arm from side body to front of body, assists with inhalation, scapula, protracts ribs

Question 19

trapzeius

Answer 19

elevates shoulders, scapula rotates inferiorly

Question 20

rhomboid major

Answer 20

stabilizes scapula during pectoral girdle movement retracts; rotates inferiorly

Question 21

pectoralis major

Answer 21

brings elbows together, moves elbow up; flexion; adduction; medial rotation

Question 22

latissimus dorsi

Answer 22

moves elbow back; humerus, extension; adduction

Question 23

deltoid

Answer 23

lift arms at shoulder, abduction; flexion

Question 24

supraspinatus

Answer 24

rotates the elbow outwards, at tennis swing

Question 25

teres major

Answer 25

assists the infraspinatus in rotating the elbow outwards

Question 26

biceps brachili

Answer 26

performs a bicep curl; also allows palm of hand to point toward body while flexing

Question 27

triceps brachili

Answer 27

extends forearm, as during a punch

Question 28

pronator teres

Answer 28

turns hand palm- down

Question 29

supinator

Answer 29

turns hand palm up

Question 30

iliacus

Answer 30

raises the knee at the hip | thigh, flexion and lateral rotation; torso: flexion

Question 31

gluteus maximus

Answer 31

lowers the knee and moves the thigh back | extenstion

Question 32

gluteus minimus

Answer 32

brings the thigh back together | abduction

Question 33

gluteus medius

Answer 33

opens thigh, as when doing a split | abduction

Question 34

adductor longus

Answer 34

brings the thighs back together, it also assists with raising knee adduction, flexion

Question 35

rectus femoris

Answer 35

moves the lower leg out in front of the body | tibia/fibula: extension; thigh, flexion

Question 36

biceps femoris

Answer 36

moves the back of the lower leg up and back towards the buttocks tibia/fibula: flexion; thigh: extension, lateral rotation

Question 37

tibialis anterior

Answer 37

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

Question 38

extensor hallucis longus

Answer 38

raises the sole of the foot off the ground | foot: dorsiflexion; big toes: extension

Question 39

extensor digitorum longus

Answer 39

raises the sole of the foot off the ground | foot: dorsiflexion; toes: extension

Question 40

gastrocnemius

Answer 40

lowers the sole of the foot to the ground | foot: plantar flexion; tibia/fibula: flexion

Question 41

soleus

Answer 41

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

Question 42

tibialis posterior

Answer 42

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

Question 43

flexor digitorum longus

Answer 43

lowers the sole of the foot to the ground | foot: plantar flexion and inversion; toes: flexion

Question 44

flexor hallicis longus

Answer 44

flexes the big toe | big toe: flexion; foot: plantar flexion