Soc 14: Muscle Fibres

Question 1

Muscle fibres

Answer 1

make up voluntary (skeletal) muscle; divided into type I, type lla and type IIx.

Question 2

Type I

Answer 2

slow twitch muscle fibres; suited to low intensity work, e.g. marathon running, as they can be used for a long period without fatiguing.

Question 3

Type IIa

Answer 3

fast twitch muscle fibres used in anaerobic work; can be improved through endurance training to increase their resistance to fatigue.

Question 4

Type IIx

Answer 4

fast twitch muscle fibres used in anaerobic work and can generate much greater force than other fibre types, but fatigue quickly.

Question 5

Myblogin

Answer 5

A red pigment that transports oxygen to the muscles