Types of muscle fibre Flashcards
1
Q
What are the 3 muscle fibre types?
A
- Slow oxidative
- Fast oxidative glycolytic
- Fast twitch glycolytic
2
Q
What is FFEESSO?
A
- Fatiguability
- Force of contraction
- Enzyme activity
- Energy source
- Speed of contraction
- Size of motor neurone
- Oxygen used?
3
Q
State FFEESSO for the slow oxidative fibres
A
- Low fatiguability
- Weak contraction
- High oxidative enzymes
- Large stores of triglycerides
- Slow contraction
- Small motor neurone size
- Oxygen is used
4
Q
What adaptations allow oxygen to be used for the slow oxidative fibres (Type 1)
A
- High mitochondria levels
- High myoglobin levels
- Triglyceride stores
- High aerobic capacity
- Low anaerobic capacity
- High capillarisation
5
Q
State FFEESSO for the fast oxidative glycolytic fibres (Type IIA)
A
- Medium fatiguability
- Powerful contraction
- High glycolytic enzymes
- Large glycogen stores
- Fast contraction
- Large motor neurone
- Oxygen is not used
6
Q
What adaptations lead to oxygen not being used through fast oxidative glycolytic fibres
A
- Glycogen -> AGS
- High anaerobic capacity
- Low aerobic capacity
- Low myoglobin levels
- Low mitochondria levels
- Low capillarisation
7
Q
State FFEESSO for fast twitch glycolytic fibres (Type IIX)
A
- High fatiguability
- Very powerful contraction
- High glycolytic enzymes
- Large PCR stores
- Very fast contraction
- Larger motor neurones
- Oxygen is not used
8
Q
What adaptations lead to oxygen not being used for the fast twitch glycolytic fibres?
A
- PCR stores -> ATP-PC
- High anaerobic capacity
- Low mitochondria, myoglobin, and capillarisation
