Which Statement About Fast-Twitch Fibers Is True

question 246

Multiple Choice

Which statement about fast-twitch fibers is true?

• A) They are more common in the leg muscles of champion sprinters than in champion marathon runners.
• B) They have more mitochondria than slow-twitch fibers in the same muscle.
• C) They fatigue less rapidly than slow-twitch fibers do.
• D) Their abundance is more a product of training than of genetics.
• E) They are more common in postural muscles than in finger muscles.

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