muscular system

Question 1

skeletal muscle

Answer 1

fibers are multinucleated structures that compose the skeletal muscle

Question 2

cardiac muscle

Answer 2

are only found in the heart

Question 3

smooth muscle

Answer 3

can be found in hollow organs such as bladder, stomach, uterus, intestines, and passageways of circulatory system

Question 4

excitability

Answer 4

Able to send electrical waves along the entire length

Question 5

elasticity

Answer 5

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

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

Question 14

sarcoplasm

Answer 14

Inner material surrounding the myofibril

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

target motion direction-depression

Question 18

serratus anterior

Answer 18

moves arm from side of body to front of body: assists with inhalation
target motion direction-scapula: protracts; ribs: elevates

Question 19

trapezius

Answer 19

elevates shoulders: pulls shoulder blades together: tilts head backwards
target motion direction-scapula: cervical spine

Question 20

rhomboid major

Answer 20

stabilizes scapula during pectoral girdle movement

target motion direction- retracts: rotates inferiorly

Question 21

pectoralis major

Answer 21

brings elbows together: moves elbows up

target motion direction- flexion; adduction; medial rotation

Question 22

latissimus dorsi

Answer 22

moves elbow back; spreads elbows apart

target motion direction- humerus; extension, adduction, medial rotation: scapula; rotation

Question 23

deltoid

Answer 23

lifts arms at the shoulder

target motion direction- abduction; flexion; extension; medial and lateral rotation

Question 24

supraspinatus

Answer 24

rotates the elbow outwards

target motion direction- abduction

Question 25

teres major

Answer 25

assists the infraspinatus in rotating the elbow outwards

target motion direction- extension; adduction

Question 26

biceps brachii

Answer 26

performs a bicep curl; also allows the palm of hand to point toward body while flexing
target motion direction-flexion; supination

Question 27

triceps brachii

Answer 27

extends forearm, as during a punch

target motion direction- extension

Question 28

pronator teres

Answer 28

turns hand palm-down

target motion direction-pronation

Question 29

supinator

Answer 29

turn hand palm-up

target motion direction- supination