the muscular system

Question 1

myo-

Answer 1

is the word part for muscles

myocardium

Question 2

over ____ muscles in the body

Answer 2

600

Question 3

responsible for

Answer 3

ALL the motions of the body

walking, breathing, digestion

Question 4

the muscular system makes up

Answer 4

most of the fleshy parts of the body which is 1/2 of body weight

Question 5

supports and maintains

Answer 5

posture

Question 6

attatch to bones to allow for

Answer 6

Movement

Question 7

movement of food through the

Answer 7

digestive system (peristalsis)

Question 8

produces

Answer 8

body heat

Question 9

skeletal muscle

Answer 9

voluntary (controlled at will)
striated - microscopically have a striped appearances
muscles attach to the skeleton

Question 10

smooth

Answer 10

involuntary
non-striated
found in stomach, intestines, blood vessels, uterus, and iris of the eye

Question 11

cardiac

Answer 11

involuntary
striated
found in the heart

Question 12

muscles turn chemical potential energy into

Answer 12

mechanical energy

Question 13

they do this by

Answer 13

contracting (tightening) and relaxing (going back to original shape)

Question 14

muscles are formed by

Answer 14

bundles and bundles of muscle fibers

Question 15

muscle fibers-

Answer 15

muscle cells that are long and slender

Question 16

sarcomere

Answer 16

basic contractile unit of a muscle cell

composed of two protein filaments called actin and myosin

Question 17

can be thousands of

Answer 17

sarcomeres in one muscle cell

Question 18

myosin will pull

Answer 18

actin fibers towards the middle, shortening the length of the muscle and contracting it

Question 19

fascia

Answer 19

sheets of fibrous membrane that encloses muscles and seperates them into groups

Question 20

ligaments

Answer 20

strong bands of fibrous tissue connecting bones or cartilage

Question 21

tendon

Answer 21

fibrous white bands that attach muscles to the bone, enabling movement of the part located some distance from the contracting muscles

Question 22

flexor

Answer 22

decreases the angle of a join

Question 23

extensor

Answer 23

increases the angle of a joint

Question 24

abductor

Answer 24

moves bones away from the middle

Question 25

adductor

Answer 25

moves bone toward the midline

Question 26

sphincter

Answer 26

forms a circular ring that controls exit and entrance