Question

Which of the following is true about fast twitch muscle fibers

Answer 1

They contract very quickly

Answer 2

Answer:

The correct answer is option B, that is, they contract very quickly.

Explanation:

The fast-twitch muscle fibers vary from the slow-twitch muscle fibers as they possess the tendency to generate energy in the non-presence of oxygen. This permits them to generate energy briskly by utilizing glycogen and phosphocreatine, to fuel those brisk explosive motions like sprinting and jumping.  

This signifies that the fast-twitch muscle fibers exhibit faster contraction speeds in comparison to the slow-twitch muscle fibers. The fast-twitch muscle fibers are further differentiated into two types. The slow-twitch muscles assist in performing long-endurance activities like distance running, while the fast-twitch muscle fibers are utilized in performing powerful spurts of movements.