Question

these muscles regulate the diameter of pupil. Amount of light entering into the eye is controlled by pupil."

Answer 1

Answer:iris(a contractile structure) regulate the amount of light by controlling the size of the pupil. This is said to be PUPILLARY LIGHT REFLEX.

Explanation: The iris has 2 groups of smooth muscles; a circular group called sphincter pupillae and a radial group called dilator pupillae. It is when the sphincter pupillae contracts, the iris is able to decrease or increase the size of the pupil.

Answer 2

Answer:

Iris regulate the diameter of pupil.

Explanation:

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