(A) The iris is the visible colored part of the eye that surrounds the pupil. It contains two sets of smooth muscle fibres: the circular sphincter pup

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(A) The iris is the visible colored part of the eye that surrounds the pupil. It contains two sets of smooth muscle fibres: the circular sphincter pupillae and the radial dilator pupillae. These muscles contract and relax to adjust the size of the pupil,thereby regulating the amount of light entering the eye.

Class 11 Biology Neural Control and Coordination Eye

Easy

The diameter of the pupils is regulated by the muscle fibres of ...........

A
Iris
B
Fovea
C
Sclera
D
All given

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Neural Control and Coordination

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The diameter of the pupils is regulated by the muscle fibres of ...........

Similar Questions

Distinguish between:$(1)$ Receptor proteins and Receptor cells.$(2)$ Aqueous humor and Vitreous humor.

The fovea (central pit in the $Macula\, lutea$) is the point where visual acuity is the highest. In the fovea:

The black pigment in the eye which reduces internal reflection is located in:

What is the function of cone cells?

What is the correct sequence of the parts of the eye that light rays pass through to reach the retina?

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Distinguish between:
$(1)$ Receptor proteins and Receptor cells.
$(2)$ Aqueous humor and Vitreous humor.