5.1 types of muscle

Question 1

what percentage of body mass does muscle tissue make up?

Answer 1

40%

Question 2

what is muscle tissue made up of?

Answer 2

muscle fibres held together by connective tissue that can contract or relax to shorten and lengthen the muscle

Question 3

what are the three types of muscle?

Answer 3

cardiac
smooth
skeletal

Question 4

where is cardiac muscle found?

Answer 4

the heart

Question 5

give some properties of cardiac muscle:

Answer 5

myogenic
doesn’t fatigue
contracts rhythmically

Question 6

where is smooth muscle found?

Answer 6

lining many internal organs

Question 7

is smooth muscle voluntary or involuntary?

Answer 7

involuntary - controlled by autonomic nervous system

Question 8

how do smooth muscle fibres contract?

Answer 8

rhythmically

Question 9

are slow muscle fibres slow or quick to fatigue?

Answer 9

slow

Question 10

what is skeletal muscle essential for?

Answer 10

voluntary movement and maintaining posture

Question 11

how is skeletal muscle attached to bones?

Answer 11

by tendons

Question 12

is skeletal muscle voluntary or involuntary?

Answer 12

voluntary

Question 13

how do skeletal muscle fibres appear?

Answer 13

striated

Question 14

how do cardiac muscle fibres appear?

Answer 14

faintly striated

Question 15

how do smooth muscle fibres appear?

Answer 15

non striated

Question 16

how is skeletal muscle arranged and why?

Answer 16

regularly

so muscle contracts in one direction

Question 17

how is cardiac muscle arranged and why?

Answer 17

branched cells that interconnect resulting in simultaneous contraction

Question 18

how is smooth muscle arranged and why?

Answer 18

non regular arrangement

different cells can contract in different directions

Question 19

what is the contraction speed of skeletal muscle?

Answer 19

rapid

Question 20

what is the contraction speed of cardiac muscle?

Answer 20

intermediate

Question 21

what is the contraction speed of smooth muscle?

Answer 21

slow

Question 22

what is the length of contraction time for skeletal muscle?

Answer 22

short

Question 23

what is the length of contraction time for cardiac muscle?

Answer 23

intermediate

Question 24

what is the length of contraction time for smooth muscle?

Answer 24

long - remains contracted for a relatively long time

Question 25

which type of muscle is multinucleated?

Answer 25

skeletal

Question 26

which types of muscle are uninucleated?

Answer 26

smooth

cardiac

Question 27

what is the function of skeletal muscle?

Answer 27

help you to move your bones

Question 28

what is the function of smooth muscle?

Answer 28

e.g. smooth muscle contracts in the oesophagus to move food to the stomach by peristalsis

Question 29

what is the function of cardiac muscle?

Answer 29

contracts to move blood around the body