Which type of muscle fiber would likely fatigue the quickest

Which type of muscle fiber would likely fatigue the quickest?

Solution

Which type of muscle fibre would likely fatigue the quickest

There are two types of muscles fibres namely Slow twitch and fast twitch muscle

Slow twitch muscles are rich in capillary, mitochondria and myoglobin. Myoglobin which store oxygen supply it continuously. They have dense network of capillary which make sure the continuous supply of oxygen. Oxygen helps in burning carbohydrate for aerobic respiration. All this features make slow twitch muscles to sustain for long time work and not fatigue easily

Fast twitch muscle- They have less mitochondria and myoglobin. They make the part of most the body muscle. They contract fast as a result of it they need more energy. Due to less mitochondria and myoglobin they don’t have alternate energy source which force them to accumulate lactic acid generated from pyruvic acid generated upon glycolysis. Accumulation of lactic acid make the muscle fatigue.