Question 1

How many extrinsic eye muscles surround one eyeball?

Accepted Answer

A)  4
B)  6
C)  12
D)  8E) C) and D)
F) B) and C)

Question 2

The rods of the retina _________ .

Accepted Answer

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

Question 3

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

Accepted Answer

A)  inferior oblique
B)  medial rectus
C)  superior oblique
D)  superior rectusE) C) and D)
F) B) and C)

Question 4

A cataract is________ .

Accepted Answer

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

Question 5

The lacrimal apparatus produces a watery solution known as ________.

Accepted Answer

A)  modified sweat
B)  tears
C)  an oily substance
D)  sebaceous fluidE) A) and C)
F) A) and B)

Question 6

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

Accepted Answer

A)  sensory layer (retina) 
B)  vascular layer (uvea) 
C)  fibrous layer (sclera) D) All of the above
E) A) and C)

Question 7

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

Accepted Answer

A)  tarsal glands
B)  ciliary glands
C)  lacrimal gland
D)  small oil glandsE) A) and B)
F) A) and C)

Question 8

The visual pathway terminates in this cortical area.

Accepted Answer

A)  auditory cortex
B)  olfactory cortex
C)  gustatory cortex
D)  visual cortexE) None of the above
F) A) and C)

Question 9

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

Accepted Answer

A)  fibrous, sensory, vascular
B)  sensory, vascular, fibrous
C)  fibrous, vascular, sensory
D)  vascular, fibrous, sensoryE) All of the above
F) None of the above

Question 10

The ________of the retina detect color and function only in________ light.

Accepted Answer

A)  cones, low
B)  rods, bright
C)  rods, low
D)  cones, brightE) A) and B)
F) B) and C)

Question 11

The photoreceptors in the retina that detect light are _________ .

Accepted Answer

A)  horizontal and amacrine cells
B)  ganglion cells
C)  bipolar cells
D)  rods and conesE) None of the above
F) All of the above

Question 12

The anterior segment of the eye contains a fluid called _________.

Accepted Answer

A)  aqueous humor
B)  vitreous humor
C)  lacrimal humorD) None of the above
E) All of the above

Question 13

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, cornea
B)  sensory layer, iris
C)  vascular layer, retinaD) All of the above
E) B) and C)

Question 14

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

Accepted Answer

A)  cornea
B)  lens
C)  ciliary muscles
D)  conjunctivaE) B) and C)
F) None of the above B

Question 15

The innermost layer of the retina ________.

Accepted Answer

A)  is a blood- rich nutritive region containing a dark pigment
B)  is composed of fibrous tissue
C)  is a transparent neural layer
D)  is a pigmented epitheliumE) C) and D)
F) A) and B)

Question 16

The ________carry tears into the nasal cavity.

Accepted Answer

A)  nasolacrimal ducts
B)  lacrimal canaliculi
C)  ciliary ducts
D)  excretory ductsE) All of the above
F) None of the above

Question 17

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

Accepted Answer

A)  visual cortex
B)  hypothalamus
C)  thalamusD) B) and C)
E) None of the above

Question 18

If the left optic nerve is severed, _________ .

Accepted Answer

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

Question 19

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

Accepted Answer

A)  conjunctiva
B)  tarsociliary epithelium
C)  palpebral mucosa
D)  bulbar epitheliumE) All of the above
F) None of the above

Question 20

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 C)
E) All of the above

Exam 23: Special Senses: Anatomy of the Visual System

How many extrinsic eye muscles surround one eyeball?

Correct AnswerverifiedShow Answer

The rods of the retina _________ .

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

A cataract is________ .

Correct AnswerverifiedC

The lacrimal apparatus produces a watery solution known as ________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The visual pathway terminates in this cortical area.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The ________of the retina detect color and function only in________ light.

Correct AnswerverifiedShow Answer

The photoreceptors in the retina that detect light are _________ .

Correct AnswerverifiedShow Answer

The anterior segment of the eye contains a fluid called _________.

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

Correct AnswerverifiedB

The innermost layer of the retina ________.

Correct AnswerverifiedShow Answer

The ________carry tears into the nasal cavity.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

If the left optic nerve is severed, _________ .

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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The of the retina detect color and function only in light.

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