O-LevelBiologyCoordination & Response5090/11 · Oct/Nov 2018 · Q211 Mark

What happens to the ciliary muscle and what happens to the lens when the eye focuses on a distant object?

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Aciliary muscle contracts, lens gets thicker

Bciliary muscle contracts, lens gets thinner

Cciliary muscle relaxes, lens gets thicker

Dciliary muscle relaxes, lens gets thinner

✓ Correct answer

D: ciliary muscle relaxes, lens gets thinner

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Topic: Coordination & Response, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2018 Paper 1 Variant 1, question 21.

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