Biology 0610 · IGCSE · Sense organs

Sense organs — practice question

The diagram illustrates how an eye looks in bright light. Which row correctly shows the state of the iris muscles in bright light?

  • Aradial muscles contracted, circular muscles contracted
  • Bradial muscles contracted, circular muscles relaxed
  • Cradial muscles relaxed, circular muscles contracted
  • Dradial muscles relaxed, circular muscles relaxed

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