V. Chapter 5

Question 0

Skeletal muscles are attached to…

Answer 0

Bones by a tendon

Question 1

Functions of the Muscular System

Answer 1

1. Movement
2. Maintains posture through steady contraction
3. Generates heat through cell metabolism
4. Muscles move substances inside the body.
   a) heart pumps blood
   b) digestive system moves food

Question 2

Skeletal muscles pull body parts…

Answer 2

Together — they never push

Question 3

Skeletal muscles usually work in…

Answer 3

Pairs

Question 4

Skeletal muscles can ________ and ________ rapidly, but…

Answer 4

Contract and relax

Tire quickly

Question 5

Skeletal muscles are

Answer 5

Voluntary or striated muscles

Question 6

Cardiac muscles contract in the heart to….

Answer 6

Pump blood through out the body

Question 7

Cardiac muscles are…

Answer 7

Striated and do not tire easily, but can be controlled consciously

Question 8

Smooth muscles contract…

Answer 8

Slowly

Question 9

Smooth muscles are found in…

Answer 9

The digestive system

Question 10

Smooth muscles move…

Answer 10

Substances in the body or an organ in the body

Question 11

Skeletal muscles are composed of…

Answer 11

Bundles of muscle fibers

Question 12

These fibers are

Answer 12

very long and are muscles cells with many nuclei

Question 13

Each muscle is composed of…

Answer 13

Many units called myofibrils

Question 14

Myofibrils are composed of…

Answer 14

Multiple units called sacromeres

Question 15

The sacromere shortens when…

Answer 15

The muscle contracts and lengthens when the muscle relaxes

Question 16

Orbicularis Oris

Answer 16

Move lips aka the kissing muscle

Question 17

Orbicularis Oculi

Answer 17

Moves eyelid

Question 18

Frontalis

Answer 18

Raises eyebrows

Question 19

Buccinator

Answer 19

Smiling muscle

Question 20

Masseter

Answer 20

Chewing

Question 21

Sternocleidomastoid

Answer 21

Bows head and let’s you turn your head from side to side

Question 22

Trapezius

Answer 22

Raises and lowers shoulders

Question 23

Latissimus Dorsi

Answer 23

Moves arm

Question 24

Biceps Brachii

Answer 24

Flexes arm

Question 25

Triceps Brachii

Answer 25

Extends arm

Question 26

Deltoid

Answer 26

Moves arms

Question 27

Gluteus Maximus

Answer 27

Moves hip and thigh (involved in moving the leg)

Question 28

Gastrocnemius

Answer 28

Pulls foot down (running, jumping, walking)

Question 29

Rectus Abdominis

Answer 29

Mains posture, pushes out air, flexes the torso (pulls upper body down), walking upright

Question 30

External Oblique

Answer 30

Breathing, rotates and side bends upper body

Question 31

Tibalis

Answer 31

Raises the foot (walking, running)

Question 32

Quadriceps

Answer 32

Group of four muscles and moves the leg. It also extends the leg.

Question 33

Hamstring

Answer 33

Group of three muscles that moves the legs (pulls the leg toward your gluteus)

Question 34

Pectoralis Major

Answer 34

Pulls arm across chest

Question 35

How many muscles are there in the human body?

Answer 35

650 muscles

Question 36

Muscles make up about _____ of your weight

Answer 36

half

Question 37

How many muscles does walking require?

Answer 37

200 muscles

Question 38

25% of your muscles are in your

Answer 38

Foot