Muscular System

Question 1

Skeletal Muscle

Answer 1

Voluntary

fibers are multinucleated structures that compose the skeletal muscle.

Question 2

Cardiac Muscle

Answer 2

Involuntary

Heart

Question 3

Smooth Muscle

Answer 3

Involuntary
smooth muscles are called so because they do not have striations. These can be found in hollow organs such as bladder, stomach, uterus, intestines, and passageways of circulatory system

Question 4

Exicability

Answer 4

Able to send electrical waves (action potential) along the entire length

Question 5

Elasticity

Answer 5

Having the ability to recoil back to its original length

Question 6

Extensibility

Answer 6

Allows muscles to stretch or extend

Question 7

Contractility

Answer 7

Allows muscles to pull on its attachment and shorten

Question 8

Fascicle

Answer 8

The muscle fibers that are arranged in bundles

Question 9

Epimysium

Answer 9

Outermost layer, surrounds entire muscle

Question 10

Perimysium

Answer 10

Separates and surrounds fascicles

Question 11

Endomysium

Answer 11

Surrounds each individual muscle fiber

Question 12

Sarcolemma

Answer 12

Muscle fiber membrane

Question 13

Myofibril

Answer 13

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

Question 14

Sarcoplasm

Answer 14

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

Question 15

Actin

Answer 15

Thin filaments

Question 16

Myosin

Answer 16

Thick filaments

Question 17

Subclavius

Answer 17

Stabilizes clavicle during movement by depressing it

Motion direction: depression

Question 18

Serratus anterior

Answer 18

Moves arm from side of body to front body; assists with inhalation 
Scapula;
protracts;
ribs;
elevates

Question 19

Trapezius

Answer 19

Elevates shoulders pulls shoulder blades together tilts head backwards
Scapula, rotates inferiorly, retracts, elevates and depresses, spine, extends

Question 20

Rhomboid major

Answer 20

Stabilizes scapula during pectoral girdle movement

Retracts, rotates inferiorly

Question 21

Pectoralis major

Answer 21

Bring elbows together, moves elbow up

Flexion, adduction, medial rotation

Question 22

Latissimus dorsi

Answer 22

moves elbow back

Humerus, extension, adduction, and medial rotation, scapula, depression

Question 23

Deltoid

Answer 23

Lifts arms at the shoulder

Abduction, flexion, extension, medial and lateral rotation

Question 24

Supraspinatus

Answer 24

Rotates the elbows outwards as during a tennis swing

Abduction

Question 25

teres major

Answer 25

Assists the infraspinatus in rotating the elbow outwards | Extension, adduction

Question 26

Biceps brachii

Answer 26

Performs a bicep curl, also allows palm of hand to point toward body while flexing Flexion Supination

Question 27

Triceps brachii

Answer 27

Extends forearm as during a punch | Extension

Question 28

Pronator Teres

Answer 28

Turns hand palm-down | Pronation

Question 29

Supinator

Answer 29

Turns hand palm-up | Supination

Question 30

Iliacus

Answer 30

Raises the knee at the | Thigh, flexion and lateral rotation

Question 31

Gluteous maximus

Answer 31

Lowers the knee and moves the thigh back | extension

Question 32

Gluteus medius

Answer 32

opens the thighs | abduction

Question 33

Gluteus minimus

Answer 33

brings the thighs back together | abduction

Question 34

adductor longus

Answer 34

brings the thighs back together | adduction, flexion

Question 35

Rectus femoris

Answer 35

Moves the lower leg out in front of the body | tibia/fibula, extension

Question 36

Biceps femoris

Answer 36

moves the back of the lower leg up and back toward the buttocks

Question 37

Tibialis anterior

Answer 37

Raises the sole of the foot off the ground | dorsiflexoin, inversion

Question 38

extensor hallucis Longus

Answer 38

Raises the sole of the foot off the ground | foot, dorsfifexion, etension

Question 39

Gastrocnemius

Answer 39

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

Question 40

soleus

Answer 40

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

Question 41

Tibialis posterior

Answer 41

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

Question 42

flexor digitorum longus

Answer 42

lowers the sole of the foot to the ground | foot, plantar fiextion

Question 43

flexor hallicis longus

Answer 43

Flexes the big toe | flexion, and iversion, toes

Question 44

extensor digtorum longus

Answer 44

raises the sole of the foot off the ground | Foot, dorifexion, extension