Which statement about skeletal muscle fibers is true?
A) Fast-twitch fibers have greater capacity for oxidative metabolism than slow-twitch fibers do.
B) A single muscle can contain both slow-twitch and fast-twitch fibers.
C) Slow-twitch fibers are white, and fast-twitch fibers are red.
D) Slow-twitch fibers can generate greater maximum tension than fast-twitch fibers.
E) Slow-twitch fibers fatigue more rapidly than do fast-twitch fibers.

Question

Quizplus · Accepted Answer

A single muscle can contain both slow-twitch and fast-twitch fibers. This allows for the muscle to have a combination of endurance and strength capabilities. The other statements are false. Fast-twitch fibers have less capacity for oxidative metabolism than slow-twitch fibers, slow-twitch fibers are red and fast-twitch fibers are white, fast-twitch fibers can generate greater maximum tension than slow-twitch fibers, and fast-twitch fibers fatigue more rapidly than slow-twitch fibers.

Which Statement About Skeletal Muscle Fibers Is True