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JAMB Biology 1979 Question 17

Question 17

Sense Organs

When the ciliary muscle of the eye contracts, the eye lens

  1. A.bulges
  2. B.contracts
  3. C.rotates
  4. D.flattens
  5. E.is rounded
Show the answer and explanation

Answer: A (bulges)

Explanation

Contraction of the ciliary muscle slackens the suspensory ligaments, so the elastic lens becomes thicker (bulges) for near vision.