CHAPTER 4: Muscular System

Question 3

spiral, 8-shaped muscles

Answer 3

cardiac

Question 4

muscles that are uninucleate

Answer 4

smooth & cardiac

Question 5

muscles that are striated

Answer 5

skeletal & cardiac

Question 6

multinucleate muscle

Answer 6

skeletal

Question 7

voluntary muscle

Answer 7

skeletal

Question 8

involuntary muscles

Answer 8

smooth & cardiac

Question 9

muscles that has no striations

Answer 9

smooth

Question 10

function of skeletal muscle

Answer 10

attach to and cover the bony skeleton

Question 11

function of smooth muscle

Answer 11

moves food through digestive tract and empties bowel and bladder

Question 12

which muscle is found mainly in the walls of hollow visceral organs?

Answer 12

smooth muscle

Question 13

function of cardiac muscle

Answer 13

propels blood throughout the vessel to all body tissues

Question 14

muscle that is only found in the heart

Answer 14

cardiac muscle

Question 15

function of the muscular system

Answer 15

responsible for movements & regulates body temperature

Question 16

structural and functional units of skeletal muscke

Answer 16

sarcomere

Question 17

bundles of protein filaments that contain contractile elements

Answer 17

myofibrils

Question 18

thick filaments: ______; thin filaments: _____

Answer 18

myosin; actin

Question 19

cytolasm of striated muscles

Answer 19

sarcoplasm

Question 20

type of muscle contraction that has no tension & no change in length

Answer 20

isometric

Question 21

type of muscle contraction that has tension & has change in length

Answer 21

isotonic

Question 22

type of isotonic contraction that shortens muscle

Answer 22

concentric

Question 23

type of isotonic contraction that lengthens muscle

Answer 23

eccentric

Question 24

muscle movement: decrease in angle, brings two bones together

Answer 24

flexion

Question 25

muscle movement: increase in angle, brings two bones away from each other

Answer 25

extension

Question 26

muscle movement: movement around its longitudinal axis

Answer 26

rotation

Question 27

muscle movement: away the midline

Answer 27

abduction

Question 28

muscle movement: to the midline

Answer 28

adduction

Question 29

muscle movement: promixal end is stationary, distale end moves in circles

Answer 29

circumduction

Question 30

muscle movement: ankle down

Answer 30

dorsiflexion

Question 31

muscle movement: toes downward

Answer 31

plantarflexion

Question 32

muscle movement: turning the sole medially

Answer 32

inversion

Question 33

muscle movement: turning the sole laterally

Answer 33

eversion

Question 34

muscle movement: palms up

Answer 34

supination

Question 35

muscle movement: palms down

Answer 35

pronation

Question 36

muscle movement: moving thumb to touch the tips of ther fingers

Answer 36

opposition

Question 37

primary muscle that moves a body part

Answer 37

prime mover

Question 38

helps primary muscles move the same movement or by reducing undesirable movements

Answer 38

synergists

Question 39

muscles that oppose a movement

Answer 39

antagonist

Question 40

function of myosin heads

Answer 40

cross-bridges; acts as motor proteins that bind to actin filaments

Question 41

funtion of titin

Answer 41

it attaches the myosin to the z-discs; acts as molecular spring