SOC 14 - Muscle Fibres

Question 1

What are Muscle Fibres?

Answer 1

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

Question 2

What are the Type 1 Fibres?

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

What are the Type 2a Fibres?

Answer 3

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

Question 4

What are the Type 2x Fibres?

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

What is Myoglobin?

Answer 5

A red pigment that transports oxygen to the muscles.