12: Muscle plasticity Flashcards
What does a darker muscle fibre type represent?
More oxidative enzymes
What does a lighter muscle fibre type represent
Less oxidative enzymes
What are the 3 key differences between fibre types?
- Type of myosin expressed
- Oxdiative vs glycolytic energy production
- Type of SERCA pump expressed
Describe the key features of type I: slow oxidative fibres
slides
Describe the key features of type IIB: Glycolytic fibres
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Describe type IIA: Intermediate fibres
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Describe the distribution of muscle fibres
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Describe the effects of strength training
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Describe the effects of endurance training
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Describe the physical limits to muscle performance
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Describe load-velocity relationship
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Describe the length-tension relationship
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What is a motor unit>
The nervous system regulates muscle force by controlling activity in ‘motor units’
-Def: A motor neuron and all the muscle fibres it innervates
What are the properties of motor units?
slides
What is muscle force regulated by
slides
Describe rate of modulation of motor units
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Describe recruitment of motor units
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What is the effect of the type of myosin expressed
slides
What is the effect of oxidatie vs glycolytic energy production
slides
What is the effect of the type of SERCA pump expressed
slide
What are two types of active control of muscle force
- Rate modulation of motor units
- Recruitment of motor units
