5.1 types of muscle Flashcards Preview

A Level Biology > 5.1 types of muscle > Flashcards

Flashcards in 5.1 types of muscle Deck (29):
1

what percentage of body mass does muscle tissue make up?

40%

2

what is muscle tissue made up of?

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

3

what are the three types of muscle?

cardiac
smooth
skeletal

4

where is cardiac muscle found?

the heart

5

give some properties of cardiac muscle:

myogenic
doesn't fatigue
contracts rhythmically

6

where is smooth muscle found?

lining many internal organs

7

is smooth muscle voluntary or involuntary?

involuntary - controlled by autonomic nervous system

8

how do smooth muscle fibres contract?

rhythmically

9

are slow muscle fibres slow or quick to fatigue?

slow

10

what is skeletal muscle essential for?

voluntary movement and maintaining posture

11

how is skeletal muscle attached to bones?

by tendons

12

is skeletal muscle voluntary or involuntary?

voluntary

13

how do skeletal muscle fibres appear?

striated

14

how do cardiac muscle fibres appear?

faintly striated

15

how do smooth muscle fibres appear?

non striated

16

how is skeletal muscle arranged and why?

regularly
so muscle contracts in one direction

17

how is cardiac muscle arranged and why?

branched cells that interconnect resulting in simultaneous contraction

18

how is smooth muscle arranged and why?

non regular arrangement
different cells can contract in different directions

19

what is the contraction speed of skeletal muscle?

rapid

20

what is the contraction speed of cardiac muscle?

intermediate

21

what is the contraction speed of smooth muscle?

slow

22

what is the length of contraction time for skeletal muscle?

short

23

what is the length of contraction time for cardiac muscle?

intermediate

24

what is the length of contraction time for smooth muscle?

long - remains contracted for a relatively long time

25

which type of muscle is multinucleated?

skeletal

26

which types of muscle are uninucleated?

smooth
cardiac

27

what is the function of skeletal muscle?

help you to move your bones

28

what is the function of smooth muscle?

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

29

what is the function of cardiac muscle?

contracts to move blood around the body

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