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Type: Multiple-Choice
Category: Skin, Skeleton, and Muscles
Level: College
Created: a month ago

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Skin, Skeleton, and Muscles Question

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College Skin, Skeleton, and Muscles

The "motor unit" in vertebrate skeletal muscle refers to what?
  1. one actin binding site and its myosin partner
  2. an entire muscle
  3. one sarcomere and all of its actin and myosin filaments
  4. one motor neuron and all of the muscle fibers on which it has synapses
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