Muscular System

Question 1

Skeletal muscle

Answer 1

fibers are multinucleated structures that compose the skeletal muscle.

Question 2

Cardiac muscle

Answer 2

only found in the heart

Question 3

Smooth muscles

Answer 3

they do not have striations. These can be found in hollow organs such as the bladder, stomach, uterus, intestines, and passageways of the circulatory system.

Question 4

Excitability

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

Contractibility

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

The outermost layer surrounds the 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; depression

Question 18

serratus anterior

Answer 18

moves arm from side of body to frint body, assist with inflation; scapula: protracts, ribs :elevate

Question 19

trapezius

Answer 19

elevates shoulders( shrugging) pulls shoulder blades together, tilts head back words ; scapula: rotates inferiorly, reacts, 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: medal rotation

Question 22

latissimus dorsi

Answer 22

moves elbows back (as in elbowing someone standing behind you): elbows spread apart; 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 elbow outwards, as during a tennis swing ; abduction

Question 25

teres major

Answer 25

assist the infraspinatus in rotating the elbow ; extension adduction

Question 26

biceps brachii

Answer 26

performs a biceps curl, also allows palm of hand to pint towards body while flexing

Question 27

triceps brachii

Answer 27

extends forearm, as during a punch; extension

Question 28

pronator teres

Answer 28

turns hand palms down ; pronation

Question 29

supinator

Answer 29

turns hand palm up; forearm