ZoologyWhich of the following type of muscle fibres will be the first one to undergo fatigue?

Which of the following type of muscle fibres will be the first one to undergo fatigue?

  1. A

    Slow oxidative fibres

  2. B

    Fast oxidative - glycolytic fibres

  3. C

    Fast glycolytic fibres

  4. D

    Aerobic fibres

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    Solution:

    Skeletal muscle fibres are three types;

    a) Slow oxidative (SO) fibres:  contract relatively slowly and use aerobic respiration (oxygen and glucose) to produce ATP; 

    b) Fast oxidative (FO) fibres:  have relatively fast contractions and primarily use aerobic respiration to generate ATP. 

    c) Fast glycolytic (FG) fibres: have relatively fast contractions and primarily use anaerobic glycolysis and undergo fatigue quickly.

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