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WAEC Biology 2016 Question 11

Question 11

Support and Movement

Muscles act in opposite directions in order to

  1. A.cause a bone to move.
  2. B.prevent dislocation at joints.
  3. C.prevent muscle fatigue.
  4. D.regulate bodily activities.
Show the answer and explanation

Answer: A (cause a bone to move.)

Explanation

Muscles can only pull. They work in antagonistic pairs (e.g. biceps and triceps): one contracts while the other relaxes, so the bone can be moved in both directions.