Q:

When a heavy object in hand is lowered, the extension at the elbow is brought about by

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When a heavy object in hand is lowered, theextension at the elbow is brought about by:


  1. active shortening of the extensors
  2. passive shortening of the extensors
  3. active lengthening of the flexors
  4. active shortening of the flexors

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C. active lengthening of the flexors

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