Question 1

Rods are responsible for _________ vision,which refers to our ability to see in _________ light.

Accepted Answer

A)   scotopic;dim
B)   scotopic;bright
C)   photopic;dim
D)   photopic;brightE) None of the above
F) A) and C)

Question 2

While recording from a bipolar cell with a center-off surround-on receptive field,you observe a hyperpolarization in your cell.The stimulus that most likely triggered this response is light that covered

Accepted Answer

A)   the surround,but not the center.
B)   the center,but not the surround.
C)   half of the center and half of the surround.
D)   the entire receptive field.E) All of the above
F) C) and D)

Question 3

Antagonistic center-surround organization means that

Accepted Answer

A)   photoreceptors in the fovea will suppress input from photoreceptors in the periphery of the eye.
B)   photoreceptors in the periphery of the eye will suppress input from photoreceptors in the fovea.
C)   light falling on the center of a receptive field has the opposite effect than light falling on the surround.
D)   light falling on the center of a receptive field has the identical effect as light falling on the surround.E) B) and C)
F) A) and D)

Question 4

A visual interneuron's receptive field is defined as the

Accepted Answer

A)   portion of the visual field to which the interneuron responds.
B)   group of photoreceptors providing the interneuron with input.
C)   combination of the interneuron and the cells with which it communicates.
D)   location on the retina where light affects the interneuron's activity.E) C) and D)
F) B) and D)

Question 5

The axons of which type of cell form the optic nerve?

Accepted Answer

A)   bipolar
B)   amacrine
C)   ganglion
D)   horizontalE) C) and D)
F) A) and B)

Question 6

Primary visual or striate cortex is located in the _________ lobe.

Accepted Answer

A)   frontal
B)   parietal
C)   temporal
D)   occipitalE) B) and D)
F) All of the above

Question 7

In which of the following ways do ganglion cells differ from the other cells in the retina?

Accepted Answer

A)   They are active only when light is present.
B)   They produce graded potentials instead of action potentials.
C)   They produce action potentials instead of graded potentials.
D)   They contain larger quantities of photopigment.E) C) and D)
F) B) and C)

Question 8

The vast majority of people with colorblindness are classified as

Accepted Answer

A)   dichromats.
B)   monochromats.
C)   anomalous trichromats.
D)   techromats.E) All of the above
F) C) and D)

Question 9

The majority of human ganglion cells are _________ cells.

Accepted Answer

A)   P
B)   M
C)   A
D)   KE) C) and D)
F) All of the above

Question 10

The fusiform face area (FFA) is found within Area

Accepted Answer

A)   MT.
B)   MST.
C)   V4.
D)   IT.E) B) and D)
F) B) and C)

Question 11

Electromagnetic radiation:

Accepted Answer

A)   does not really exist.
B)   can be described as the movement of tiny particles called photons.
C)   is made up of tiny particles called electromagnetons.
D)   describes only the type of energy that is visible to the human eye.E) B) and C)
F) A) and D)

Question 12

Describe the organization of the lateral geniculate nucleus.

Accepted Answer

Input from the two eyes remains separate...

Question 13

Pupil diameter

Accepted Answer

A)   does not change.
B)   adjusts to the temperature of the external environment.
C)   responds only to the amount of light present in the environment.
D)   responds to the amount of light present in the environment as well as the organism's emotional state.E) B) and C)
F) A) and D)

Question 14

The human blind spot results when light falls on the

Accepted Answer

A)   fovea.
B)   optic disk.
C)   macula.
D)   temporal retina.E) C) and D)
F) B) and C)

Question 15

People with prosopagnosia might also demonstrate the phenomenon of blindsight.

Accepted Answer

A) True 
 B)False

Question 16

Rhodopsin absorbs photons most effectively from wavelengths that appear

Accepted Answer

A)   red.
B)   yellow.
C)   blue-green.
D)   violet.E) B) and D)
F) All of the above

Question 17

Many axons in the optic tract synapse in the _________ nucleus of the thalamus.

Accepted Answer

A)   medial geniculate
B)   lateral geniculate
C)   ventral posterior
D)   ventral posterior medialE) B) and D)
F) A) and B)

Question 18

The area of the retina that lacks large blood vessels and is responsible for central vision is called the:

Accepted Answer

A)   optic disk.
B)   anterior chamber.
C)   temporal retina.
D)   macula.E) B) and D)
F) All of the above

Question 19

While viewing the Hermann Grid,we see gray dots at the intersections of the lines that disappear when we look directly at an intersection.Most explanations of this phenomenon argue that it results from

Accepted Answer

A)   fatigue of photoreceptors from looking at the bright lines.
B)   the receptive field organization of ganglion cells.
C)   color contrast.
D)   color constancy.E) B) and C)
F) None of the above

Question 20

One of the reasons that rods are more sensitive to dim light than cones is that

Accepted Answer

A)   they form graded potentials instead of the action potentials formed by cones.
B)   they are found in the eye in greater numbers than cones.
C)   it takes less light to break apart rhodopsin than the photopigments found in cones.
D)   rhodopsin shows a peak response to all wavelengths in the visual spectrum.E) None of the above
F) A) and B)

Exam 6: Vision

A visual interneuron's receptive field is defined as the

Correct AnswerverifiedShow Answer

Rods are responsible for _________ vision,which refers to our ability to see in _________ light.

Correct AnswerverifiedShow Answer

The human blind spot results when light falls on the

Correct AnswerverifiedShow Answer

One of the reasons that rods are more sensitive to dim light than cones is that

Correct AnswerverifiedShow Answer

While viewing the Hermann Grid,we see gray dots at the intersections of the lines that disappear when we look directly at an intersection.Most explanations of this phenomenon argue that it results from

Correct AnswerverifiedShow Answer

Many axons in the optic tract synapse in the _________ nucleus of the thalamus.

Correct AnswerverifiedShow Answer

Antagonistic center-surround organization means that

Correct AnswerverifiedShow Answer

Primary visual or striate cortex is located in the _________ lobe.

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The area of the retina that lacks large blood vessels and is responsible for central vision is called the:

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The axons of which type of cell form the optic nerve?

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Describe the organization of the lateral geniculate nucleus.

Correct AnswerverifiedInput from the two eyes remains separate...View AnswerShow Answer

The vast majority of people with colorblindness are classified as

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In which of the following ways do ganglion cells differ from the other cells in the retina?

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The majority of human ganglion cells are _________ cells.

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Pupil diameter

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The fusiform face area (FFA) is found within Area

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Electromagnetic radiation:

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Rhodopsin absorbs photons most effectively from wavelengths that appear

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People with prosopagnosia might also demonstrate the phenomenon of blindsight.

Correct AnswerverifiedShow Answer

While recording from a bipolar cell with a center-off surround-on receptive field,you observe a hyperpolarization in your cell.The stimulus that most likely triggered this response is light that covered

Correct AnswerverifiedShow Answer

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Rods are responsible for _ vision,which refers to our ability to see in _ light.

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Input from the two eyes remains separate...
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