Muscular System

Question 1

What is the job of the muscular system?

Answer 1

it is responsible for the movement of bones, heart, and the inner linings of some organs

Question 2

What provides the power to bones and joints to cause movement?

Answer 2

the muscular system

Question 3

How many muscles are there in the human body?

Answer 3

over 600

Question 4

What is the percentage of body mass made up by muscle?

Answer 4

35-40%

Question 5

Muscles use energy in the form of what?

Answer 5

ATP

Question 6

How does the body get ATP?

Answer 6

from the breakdown of glucose during cell respiration

Question 7

What is another name for C6H12O6?

Answer 7

sugar

Question 8

How do muscles attach to the bones?

Answer 8

Through a connective tissue called tendons

Question 9

What are voluntary muscles?

Answer 9

muscles you can control

Question 10

What are involuntary muscles?

Answer 10

muscles you can ‘t control

Question 11

What is another name for muscle cells?

Answer 11

muscle fibers

Question 12

What are 3 types of human muscle types?

Answer 12

skeletal, smooth, & cardiac

Question 13

What are some characteristics of skeletal muscles?

Answer 13

1. voluntary, 2. connected to bones, 3. striated, 4. tire easily 5. have long fibers

Question 14

What are some characteristics of smooth muscles?

Answer 14

1. no striations, 2. not connected to bones 3. involuntary muscle

Question 15

What are some characteristics of cardiac muscles?

Answer 15

1. involuntary, 2. long interweaving fibers 3. not connected to bone, 4. band-like appearance

Question 16

Where are smooth muscles located?

Answer 16

digestive organs (stomach, intestines), blood vessels

Question 17

Which two types of muscles are involuntary?

Answer 17

smooth and cardiac

Question 18

Which two types of muscles are NOT connected to bone?

Answer 18

smooth and cardiac

Question 19

adductor

Answer 19

a muscle that draws a body part, like a finger, inward toward the body

Question 20

abductor

Answer 20

a muscle that draws a body part, like a finger away from the body

Question 21

flex

Answer 21

to bend a joint, to contract a muscle

Question 22

extend

Answer 22

to open or straighten out, unbend

Question 23

abdominals

Answer 23

support the abdomen wall

Question 24

biceps brachii

Answer 24

flexes forearm at elbow (bends forearm)

Question 25

biceps femoris

Answer 25

flexes leg at the knee (hamstring)

Question 26

deltoid

Answer 26

think triangular muscle covering the should joint, used to raise arm from the side

Question 27

gastroenemius

Answer 27

largest, most prominent muscle of the calf of the leg, the action which extends the foot

Question 28

gluteus maximus

Answer 28

extends hip, for standing up

Question 29

latissimus dorsi

Answer 29

adduction of the humerus, runs from vertebrae to humerus

Question 30

masseter

Answer 30

muscle in cheek that closes lower jaw when chewing

Question 31

pectorallis major

Answer 31

adducts humerus, moves shoulder, deep breathing

Question 32

quadriceps femoris

Answer 32

extends and rotates femur, straightens the leg

Question 33

satorius

Answer 33

flexes hi and knee, bends leg, longest muscle in the body

Question 34

tibialis anterior

Answer 34

flexes foot for walking

Question 35

trapezius

Answer 35

elevates scapula (lifts shoulder)

Question 36

triceps brachii

Answer 36

extends forearm at elbow (straightens arm)

Question 37

Where is the location of the cardiac muscle?

Answer 37

in the heart only

Question 38

Muscles work by always _______ and never ________

Answer 38

pulling, never pushing

Question 39

What is a contraction?

Answer 39

when a muscle shortens

Question 40

What is relaxation?

Answer 40

when the muscle returns to its regular shape

Question 41

Muscles work in pairs….when one ________ the other ________

Answer 41

contracts, relaxes

Question 42

Name two muscles that work in pairs

Answer 42

biceps and triceps

Question 43

The strength of the contraction is determined by what?

Answer 43

the number of muscle fibers that contract

Question 44

What is the “all or none” rule?

Answer 44

the muscle fiber either contracts as hard as it can or it doesn’t contract at all