Which of the following nerve fibers control the correct length of a muscle during motor function?
  1. Nuclear chain fiber
  2. Static nuclear bag fiber
  3. Dynamic nuclear bag fiber
  4. Both A and B
Explanation
Answer - D - Both the nuclear chain fiber and static nuclear bag fiber are responsible for control over the proper length of a muscle during a motor function. Dynamic nuclear bag fibers are responsible for the velocity of a muscle during a motor function.
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