The diameter of the pupil is regulated by which of the following?(a) Muscle fibres of the iris(b) Sclera(c) Choroid layer(d) Muscle fibres of the lensI have been asked this question in examination.The above asked question is from Neural Control and Coordination topic in chapter Neural Control and Coordination of Biology – Class 11

The diameter of the pupil is regulated by which of the following?(a) M

1.	The diameter of the pupil is regulated by which of the following?(a) Muscle fibres of the iris(b) Sclera(c) Choroid layer(d) Muscle fibres of the lensI have been asked this question in examination.The above asked question is from Neural Control and Coordination topic in chapter Neural Control and Coordination of Biology – Class 11
Answer» Right ANSWER is (a) MUSCLE fibres of the IRIS To elaborate: The diameter of the PUPIL is regulated by the muscle fibres of the iris. The eyeball contains a transparent crystalline LENS which is held in place by the ligaments attached to the ciliary body.

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