Practice Quiz

NPTE Physical Therapist Exam Review

Category - Physical Therapy

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Which of the following does not correctly describe fast-twitch muscles fibers?
  1. They have a quick rate of calcium ion releases
  2. They use blood glucose and muscle glycogen for energy.
  3. They are used during aerobic exercises.
  4. They generate fast, powerful muscle actions.
Explanation
Answer: C - All these statements are true of fast-twitch muscles except that they are used for aerobic exercises; rather, they are used for anaerobic ones such as spiking a volleyball. Their speed of shortening and force development is much faster than the slow-twitch muscles.
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