Question 1

A sagittal lesion in the optic chiasma will result in loss of .

Accepted Answer

A)   lateral vision in both eyes
B)   medial vision in both eyes
C)   loss of lateral vision in the left eye and medial vision in the right eye
D)   loss of lateral vision in the right eye and medial vision in the left eyeE) B) and D)
F) B) and C)

Question 2

A cataract is _.

Accepted Answer

A)   cloudiness in the lens, rendering it hard and opaque
B)   cloudiness in the cornea, rendering it opaque
C)   darkening of the vitreous humor
D)   cloudiness in the aqueous humorE) A) and B)
F) A) and D)

Question 3

Axons of ganglion cells form the optic tract. These fibers synapse with neurons in the .

Accepted Answer

A)   hypothalamus
B)   visual cortex
C)   thalamus
D)   corpus callosumE) C) and D)
F) A) and B)

Question 4

The retinal cells that are closest to the vascular layer are the .

Accepted Answer

A)   ganglion cells
B)   bipolar cells
C)   rods and conesD) A) and B)
E) A) and C)

Question 5

If the left optic nerve is severed, _.

Accepted Answer

A)   the person is blind in the right eye
B)   the lateral peripheral vision is diminished
C)   the person is blind in the left eye
D)   the person is blindE) B) and D)
F) B) and C)

Question 6

Of the glands listed here, which one produces the oily substance that covers the conjunctiva?

Accepted Answer

A)   lacrimal gland
B)   lacrimal caruncle
C)   tarsal glands
D)   ciliary bodyE) B) and C)
F) None of the above

Question 7

Below are listed pairs of anatomical structures. The first is a layer of the wall of the eye, and the second is a structure that is a part of that layer. Select the pair that correctly matches layer with structure.

Accepted Answer

A)   fibrous layer, choroid
B)   fibrous layer, cornea
C)   sensory layer, iris
D)   vascular layer, retinaE) A) and B)
F) A) and C)

Question 8

The photoreceptors in the retina that detect light are _ .

Accepted Answer

A)   rods and cones
B)   horizontal and amacrine cells
C)   ganglion cells
D)   bipolar cellsE) B) and C)
F) B) and D)

Question 9

From outermost to innermost layers, the wall of the eye consists of these three layers.

Accepted Answer

A)   fibrous, vascular, sensory
B)   sensory, vascular, fibrous
C)   vascular, fibrous, sensory
D)   fibrous, sensory, vascularE) None of the above
F) A) and B) A

Question 10

The ciliary zonule (suspensory ligament)  holds this structure in front of the pupil.

Accepted Answer

A)   cornea
B)   conjunctiva
C)   lens
D)   ciliary musclesE) B) and C)
F) None of the above

Question 11

The is a blind spot on the retina, while the _ contains only cones and is the retinal area of greatest visual acuity.

Accepted Answer

A)   fovea centralis, optic disc
B)   fundus, macula lutea
C)   macula lutea, fundus
D)   optic disc, fovea centralisE) C) and D)
F) None of the above

Question 12

This extrinsic eye muscle elevates the eye and turns it medially.

Accepted Answer

A)   inferior oblique
B)   medial rectus
C)   superior rectus
D)   superior obliqueE) None of the above
F) All of the above

Question 13

The carry tears into the nasal cavity.

Accepted Answer

A)   lacrimal canaliculi
B)   excretory ducts
C)   nasolacrimal ducts
D)   ciliary ductsE) A) and C)
F) B) and C) C

Question 14

The innermost layer of the retina .

Accepted Answer

A)   is a pigmented epithelium
B)   is composed of fibrous tissue
C)   is a transparent neural layer
D)   is a blood-rich nutritive region containing a dark pigmentE) None of the above
F) All of the above

Question 15

The ciliary body is a modified part of this layer (tunic)  of the eyeball.

Accepted Answer

A)   vascular layer (uvea) 
B)   sensory layer (retina) 
C)   fibrous layer (sclera) D) None of the above
E) All of the above

Question 16

The rods of the retina .

Accepted Answer

A)   are found in highest density in the macula lutea
B)   are present in large numbers in the fovea centralis
C)   function only in bright light
D)   are found in highest density at the periphery of the retinaE) B) and C)
F) C) and D)

Question 17

This structure, present in the cow eye but not in the human eye, is a special iridescent reflecting surface that helps animals to see in low light conditions.

Accepted Answer

A)   vascular layer
B)   pigmented sclera
C)   tapetum lucidum
D)   ciliary bodyE) None of the above
F) A) and B) C

Question 18

The visual pathway terminates in this cortical area.

Accepted Answer

A)   visual cortex
B)   auditory cortex
C)   olfactory cortex
D)   gustatory cortexE) All of the above
F) C) and D)

Question 19

Contraction of muscles within this structure leads to alteration in the shape of the lens.

Accepted Answer

A)   iris
B)   pupil
C)   ciliary body
D)   choroidE) All of the above
F) A) and D)

Question 20

This mucous membrane covers the surface of the eyeball and lines the eyelid.

Accepted Answer

A)   bulbar epithelium
B)   conjunctiva
C)   tarsociliary epithelium
D)   palpebral mucosaE) None of the above
F) C) and D)

Exam 23: Special Senses: Anatomy of the Visual System

A sagittal lesion in the optic chiasma will result in loss of .

Correct AnswerverifiedShow Answer

A cataract is _.

Correct AnswerverifiedShow Answer

Axons of ganglion cells form the optic tract. These fibers synapse with neurons in the .

Correct AnswerverifiedShow Answer

The retinal cells that are closest to the vascular layer are the .

Correct AnswerverifiedShow Answer

If the left optic nerve is severed, _.

Correct AnswerverifiedShow Answer

Of the glands listed here, which one produces the oily substance that covers the conjunctiva?

Correct AnswerverifiedShow Answer

Below are listed pairs of anatomical structures. The first is a layer of the wall of the eye, and the second is a structure that is a part of that layer. Select the pair that correctly matches layer with structure.

Correct AnswerverifiedShow Answer

The photoreceptors in the retina that detect light are _ .

Correct AnswerverifiedShow Answer

From outermost to innermost layers, the wall of the eye consists of these three layers.

Correct AnswerverifiedA

The ciliary zonule (suspensory ligament) holds this structure in front of the pupil.

Correct AnswerverifiedShow Answer

The is a blind spot on the retina, while the _ contains only cones and is the retinal area of greatest visual acuity.

Correct AnswerverifiedShow Answer

This extrinsic eye muscle elevates the eye and turns it medially.

Correct AnswerverifiedShow Answer

The carry tears into the nasal cavity.

Correct AnswerverifiedC

The innermost layer of the retina .

Correct AnswerverifiedShow Answer

The ciliary body is a modified part of this layer (tunic) of the eyeball.

Correct AnswerverifiedShow Answer

The rods of the retina .

Correct AnswerverifiedShow Answer

This structure, present in the cow eye but not in the human eye, is a special iridescent reflecting surface that helps animals to see in low light conditions.

Correct AnswerverifiedC

The visual pathway terminates in this cortical area.

Correct AnswerverifiedShow Answer

Contraction of muscles within this structure leads to alteration in the shape of the lens.

Correct AnswerverifiedShow Answer

This mucous membrane covers the surface of the eyeball and lines the eyelid.

Correct AnswerverifiedShow Answer

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