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The pupil becomes bigger to allow more l...

The pupil becomes bigger to allow more light during dark by the

A

Contraction of radial muscles of the iris

B

Relaxation of radial muscles of the iris

C

Relaxation of radial muscles of the iris

D

Contraction of suspensory ligaments

Text Solution

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The correct Answer is:
A
When the sphincter papillae contract the iris decreases or constricts the size of the pupil. The dilator pupil innervated by sympathetic nerves from the superior cervical ganglion causes the pupil to dilate when they contract.
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