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Sport - Muscular

Sport - Muscular System Fibre Types

TermDefinition
Mitochondria found in the muscle where aerobic respiration takes place
Aerobic respiration producing energy using oxygen energy is released from glucose
Anaerobic respiration producing energy without oxygen energy is released from glucose
Aerobic activities low intensity endurance
Anaerobic activities high intensity power
Characteristics of type I slow twitch contract slowly low force of contraction aerobic high resistance to fatigue
Characteristics of type IIa fast twitch contract fast medium force of contraction aerobic & anaerobic medium resistance to fatigue
Characteristics of type IIx fast twitch contract very fast high force of contraction anaerobic low resistance to fatigue
What type of muscle fibres are used in endurance events e.g. marathons & triathlons? type I slow twitch
What type of muscle fibres are used in middle distance events e.g. 400m, tennis rally? type IIa fast twitch
What type of muscle fibres are used in power events e.g. 100m & javelin? type IIx fast twitch
Which system works with the muscular system to bring about muscle contraction? the nervous system
What are motor neurones? nerves
What is a motor unit? the motor neuron attached to a number of muscle fibres in the muscle
What is the 'all or none law'? all the fibres attached to the motor neurone will contract
What does the force the muscle produces depend on? the amount of motor units stimulated to contract
Created by: samfitter
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