Which Statement About Fast-Twitch and Slow-Twitch Fibers Is True

question 232

Multiple Choice

Which statement about fast-twitch and slow-twitch fibers is true?

• A) In skeletal muscle, the most important factor determining the proportion of fast- and slow-twitch fibers is physical training.
• B) Aerobic training increases the oxidative capacity of intermediate fibers.
• C) A single muscle cell may contain fast- and slow-twitch fibers.
• D) Fast-twitch fibers fatigue slowly.
• E) Champion sprinters are likely to have a high proportion of slow-twitch fibers in their legs.

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