Soc 14 Flashcards
1
Q
Voluntary muscles
A
Voluntary muscles are under your control, you can choose when to contract or relax them.
2
Q
How are voluntary muscles shaped?
A
They are usually made up of cylinder shaped fibres and are usually long and thin but get shorter and fatter when contracted.
3
Q
Muscles fibres
A
make up voluntary (skeletal) muscle; divided into type I, type lla and type llx.
4
Q
Type I
A
Type I: slow twitch muscle fibres; suited to low intensity work, e.g. marathon runner
5
Q
Type IIa
A
fast twitch muscle fibres used in anaerobic work; can be improved through endurance training to increase their resistance to fatigue.
6
Q
Type IIx
A
fast twitch muscle fibres used in anaerobic work and can generate much greater force than other fibre types, but fatigue quickly.
