Fast-twitch fibers
A) are also called red muscle.
B) fatigue rapidly.
C) have more mitochondria per cell than do slow-twitch fibers within the same muscle.
D) are also called oxidative muscle.
E) are found in higher proportion in the leg muscles of champion marathon runners than weight lifters.

Question

Quizplus · Accepted Answer

Fast-twitch fibers, also known as type II fibers, fatigue rapidly compared to slow-twitch fibers which are also known as type I fibers.

Fast-Twitch Fibers