Muscle Contraction

Question 1

What are the three types of muscle tissue in mammals?

Answer 1

skeletal muscle, cardiac muscle and involuntary/smooth muscle

Question 2

What are skeletal muscles attached to the skeleton by?

Answer 2

tendons

Question 3

What is skeletal muscle used for?

Answer 3

used in conscious or voluntary movement

Question 4

What does skeletal muscle consist of?

Answer 4

fibres

Question 5

What are the fibres in skeletal muscle shaped like?

Answer 5

long tubes

Question 6

What does each fibre in skeletal muscle contain?

Answer 6

a number of nuclei

Question 7

What is the appearance of skeletal muscle fibres?

Answer 7

the fibres have a striped or striated appearance and are arranged in a regular pattern

Question 8

During contraction what happens to skeletal muscle fibres?

Answer 8

all the fibres contract in the same direction

Question 9

Can skeletal muscle fibres contract rapidly?

Answer 9

Yes

Question 10

Do skeletal muscle fibres stay contracted for a long period of time?

Answer 10

No

Question 11

Where is cardiac muscle found?

Answer 11

found only in the heart

Question 12

Is cardiac muscle under voluntary or involuntary control?

Answer 12

involuntary control

Question 13

What type of muscle cells are branched?

Answer 13

cardiac muscle cells

Question 14

What feature allows cardiac muscle cells to contract together?

Answer 14

cardiac muscle cells are connected to each other at the ends

Question 15

Usually, how many nuclei does each cardiac muscle cell have?

Answer 15

only one nucleus

Question 16

Cardiac muscle cell form fibres with a what appearance?

Answer 16

striped or striated appearance

Question 17

What is the difference between the striations in cardiac muscle than in skeletal muscle?

Answer 17

cardiac muscle fibres’ striations are fainter than in skeletal muscles

Question 18

Cardiac muscle cells contract without the need for a what? And what is this called?

Answer 18

without a nervous signal and scientists say that they are myogenic

Question 19

Where is involuntary/smooth muscle found?

Answer 19

all over the body

Question 20

What is peristalsis?

Answer 20

Where involuntary muscle in the walls of the intestines contracts to move digested material along the digestive system

Question 21

What type of muscle is found in the walls of blood vessels?

Answer 21

involuntary/smooth muscle

Question 22

Is involuntary muscle striated?

Answer 22

No

Question 23

Is involuntary muscle under voluntary control?

Answer 23

no

Question 24

How many nuclei do involuntary muscle cells usually have?

Answer 24

a single nucleus per cell

Question 25

Is smooth/involuntary muscle arranged regularly?

Answer 25

No - not as regular as cardiac or skeletal muscle

Question 26

Do involuntary muscle cells contract in the same direction?

Answer 26

involuntary muscle cells do not all contract in the same direction

Question 27

Does involuntary muscle contract rapidly or slowly? And does involuntary muscle contract for a long or short period of time?

Answer 27

unlike skeletal and cardiac muscle, involuntary muscle contracts slowly but can contract for a relatively long time