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JAMB Biology 1980 Question 14

Question 14

Support and Movement

The joint between the atlas and axis vertebrae allows for

  1. A.rotatory movements only
  2. B.up and down or nodding movements only
  3. C.rotatory and nodding movements
  4. D.no movement at all
  5. E.slight movement.
Show the answer and explanation

Answer: A (rotatory movements only)

Explanation

The atlas turns round the odontoid peg of the axis, a pivot joint that allows rotation (shaking the head "no").