3.04 Sensory System Unit Test

The lens of the eye lies directly behind the _________.

• iris and pupil

• cornea and sclera

• retina and optic nerve

• vitreous humor and aqueous humor

The iris is the _________.

• colored part of the eye, muscle layer that surrounds the pupil

• transparent layer covering the eye

• light-sensitive layer at the back of the eye

• gel-like substance filling the eye

The eye is protected by the ___________________________.

• sclera

• cornea

• retina

• iris

The eyeball has three coats: the ___________.

• SCLERA, CHOROID COAT AND RETINA

• CORNEA, LENS AND RETINA

• IRIS, PUPIL AND RETINA

• CONJUNCTIVA, CORNEA AND LENS

The white of the eye is called the ________________.

• sclera

• cornea

• retina

• iris

What clear structure is called the “window of the eye?”

• Cornea

• Iris

• Lens

• Retina

The anterior chamber of the eye is filled with ______.

• aqueous humor

• vitreous humor

• blood

• lymph

Where on the retina do nerve fibers gather to form the optic nerve?

• Macula

• Fovea

• Optic disc

• Retinal periphery

The size of the iris and pupil is changed by ____________ and _____ muscles.

• intrinsic, extrinsic

• extrinsic, intrinsic

• ciliary, radial

• sphincter, dilator

The crystalline structure behind the pupil that focuses light rays on the retina is the ___________.

• lens

• cornea

• retina

• iris