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What must happen for the pupil of the eye to dilate? A) The circular muscle of the iris must contract. B) Cranial nerve III must be activated. C) Stimulation of the sympathetic nervous system is required.
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What must happen for the pupil of the eye to dilate?

A) The circular muscle of the iris must contract.
B) Cranial nerve III must be activated.
C) Stimulation of the sympathetic nervous system is required.
D) The optic nerve must be stimulated.

User Dmitry Nogin
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2 Answers

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Your correct answer is A
User Yaakov Ellis
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8.1k points
5 votes
stimulation of the sympathetic nervous system is required
User Julio Rodrigues
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7.5k points
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