Practice Quiz

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Category - Sciences

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In order to prevent a muscle from stretching too far, a muscle spindle will become excited and cause the muscle to contract because it is sensitive to what distortion of muscle tissue?
  1. Change in length and rate of length change
  2. Change in length and muscular tension
  3. Change in muscular tension and rate of the tension change
  4. Change in rate of tension change and rate of length change
Explanation
Answer - A - Muscle spindles are sensitive to change in length and rate of length change, thus preventing a muscle from stretching too far. Muscle spindles will stretch when a muscle stretches. If a muscle stretches too far, the muscle spindles will become excited, causing the muscle to contract to prevent injury.
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