Muscle System

Question 1

function of the muscle cells (3)

Answer 1

can contract and expand to make body parts move
1. move skeletal system
2. move blood through heart and blood vessels
3. move food through digestive system

Question 2

peristalsis

Answer 2

the movement of food through the digestive system

slow and rhythmic contractions and relaxations of smooth (visceral) muscle tissue

Question 3

What are the only cells that have the ability to expand and contract?

Answer 3

muscle cells

Question 4

What percent of human male body weight is muscle tissue?

Answer 4

60%

Question 5

What percent of female body weight is muscle tissue?

Answer 5

40%

Question 6

How many skeletal muscles are in the human body?

Answer 6

600

Question 7

Where is skeletal muscle tissue found?

Answer 7

along the bones of the body

Question 8

tendon

Answer 8

attaches muslce to bones

Question 9

How long can skeletal muscles be?

Answer 9

1.5 inches long

Question 10

What kind of cells can be multinucleated (have more than one nucleus)?

Answer 10

skeletal muscles

Question 11

Straited cells

Answer 11

contain large amounts of protein
contain bands called myosin and actin

Question 12

Are skeletal muscles voluntary or involuntary

Answer 12

Voluntary

Question 13

voluntary movement

Answer 13

contractions and relaxations caused by a conscious effort

Question 14

What kind of cells appear as neatly stacked pipes?

Answer 14

skeletal muscle cells

Question 15

function of skeletal muscle cells

Answer 15

to pull on tendons attached to bones to make the skeletal system move

Question 16

What kind of muscle work in pairs?

Answer 16

skeletal muscle

Question 17

fiber

Answer 17

a muscle cell

Question 18

All-or-None Law

Answer 18

when stimulated a muscle cell will contract completely or not at all

Question 19

How is skeletal muscle strength determined?

Answer 19

By how many muscles are “told” to contract at a given time

Question 20

Lactic Acid

Answer 20

Waste product of skeletal muscle cells’ contractions and relaxations

diffuses to the bloodstream and is taken to the liver

Question 21

What does the liver do to lactic acid?

Answer 21

converts it to glycogen (a stored form of glucose - sugar)

Question 22

Where is cardiac muscle tissue found?

Answer 22

only in the heart- especially the ventricles (lower pumping chambers)

Question 23

Are cardiac muscle tissues multi-nucleated (have more than one nucleus)?

Answer 23

Some are

Question 24

how do heart muscles move

Answer 24

they contract and relax rhythmically

Question 25

Are heart muscles striated?

Answer 25

Yes, but not as much as skeletal muscle cells

Question 26

What kind of cells are branched?

Answer 26

cardiac muscle cells

Question 27

Where are disks present?

Answer 27

cardiac muscle cells

Question 28

Unique characteristic of heart muscle cells

Answer 28

able to contract and relax without being stimulated by a nerve-borne impulse

Question 29

visceral muscle tissue

Answer 29

smooth

Question 30

Is visceral muscle tissue voluntary or involuntary?

Answer 30

Involuntary

Question 31

Is visceral muscle tissue striated?

Answer 31

very, very few striations

Question 32

Is visceral muscle tissue multi-nucleated?

Answer 32

No - one one nucleus per cell

Question 33

Where can you find visceral muscle tissue?

Answer 33

walls of arteries and veins (make blood flow)
walls of digestive organs (allow food to be churned and passed along) - peristalsis