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chillywilly4242 chillywilly4242
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6 years ago
A single motor unit usually contains a motor neuron and
 
  a. one muscle fiber.
 b. both fast and slow-twitch fibers.
 c. either fast-twitch or slow-twitch fibers, but not a mixture of the two types.
  d. a muscle spindle.
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Ca1234Ca1234
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Thanks for your help!!
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Good timing, thanks!
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Smart ... Thanks!
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