Answer:
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Step-by-step explanation:
Type 1 muscle fibres have a higher count of mitochondria which means it can process energy quicker, it receives a good blood supply since it has a high amount of capillaries, which means it has a good supply of oxygen, which helps to maintain the use of the aerobic energy system for longer, making type 1 fibres more effect for endurance events, the contraction strength and motor unit size is small in comparison to the other fibres.
Type 2a muscle fibres have a less count of mitochondria which means it can’t process energy as quick as type 1, it receives lesser blood supply than type 1, since it has a lesser amount of capillaries, which means it has a poor supply of oxygen in comparison, however its aerobic and anaerobic capacity are both medium making it balanced at most activities, the contraction strength and motor unit size is larger in comparison to type 1 fibres, meaning its capable of exerting more strength.
Type 2b muscle fibres are capable of exerting high force in their contractions, they recruit large number of motor neurons and fibres for actions and each fibre contracts at a fast rate to make the action promptly. However they contain low amounts of mitochondria so aren’t able to generate energy at the same rate at which they use it, which means they are forced to use the anaerobic energy system, so type 2b fibres have a high anaerobic capacity and a low aerobic capacity.