Question

White fibres fatigue faster than red ones. Yet, they are of great significance. Justify.

Answer 1

Dear Student

White muscle fibres appeared white due to less amount of myoglobin. These are muscle fibres are thick and show fast contraction and is dependent on anaerobic metabolism for energy. White muscle fibres get fatigued soon because of less number of mitochondria and therefore it performs fast and strenuous work for short duration of time.

​​​​​​Significance of white fibres

• The white muscle fibre becomes active at high intensity action short duration.
• They are known as the fast-twitch muscle.
• They are active during fast contraction.

Regards