Biology 5090 · O Level · Mammalian sense organs

Mammalian sense organs — practice question

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

  • Aciliary muscle contracts; lens gets thicker
  • Bciliary muscle contracts; lens gets thinner
  • Cciliary muscle relaxes; lens gets thicker
  • Dciliary muscle relaxes; lens gets thinner

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI