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Neural Control and Coordination — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYNeural Control and Coordination1 Mark
MCQ
The size of pupil is controlled by the:
  • A
    Ciliary muscles
  • B
    Suspensory ligaments
  • C
    Cornea
  • D
    Iris muscles
✓

Answer

  1. Iris muscles

Explanation:

The pupil is the opening in the centre of the iris. 

The size of the pupil determines the amount of light, that enters the eye. 

The pupil size is controlled by the dilator and sphincter muscles of the iris.

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