The Beginning Of The Perceptual Process

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Question 41
Multiple Choice

 Rods and cones synapse with _____ cells, which then synapse with ____ cells.

Choose correct answer/s
A
ganglion; bipolar
B
bipolar; ganglion
C
amacrine; unipolar
D
amacrine; bipolar
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Question 42
Multiple Choice

 Converging circuits with excitation and inhibition are associated most closely with which step of the perceptual process

Choose correct answer/s
A
recognition
B
attention
C
neural processing
D
the environmental stimulus
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Question 43
Multiple Choice

 If we compare how the rods and cones converge onto other retinal neurons, we find that _____ .

Choose correct answer/s
A
foveal cones converge more than the peripheral rods
B
rods and cones converge equally
C
rods converge more than foveal cones
D
horizontal cells converge onto the peripheral cones
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Question 44
Multiple Choice

 Convergence results in _____ sensitivity and _____ acuity.

Choose correct answer/s
A
increased; increased
B
increased; decreased
C
decreased; decreased
D
decreased; increased
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Question 45
Multiple Choice

 Reading the eye chart in an optometrist's office is used to measure _____ .

Choose correct answer/s
A
acuity?
B
sensitivity
C
receptive fields
D
creativity
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Question 46
Multiple Choice

 Acuity is better in the _____ than in the _____ .

Choose correct answer/s
A
periphery; fovea
B
optic disk; fovea
C
optic disk; cornea
D
fovea; periphery
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Question 47
Multiple Choice

 The difficulty of reading under dim light conditions can be explained by _____ .

Choose correct answer/s
A
the increased sensitivity of cones under low light conditions
B
the increased acuity of cones under low light conditions
C
the fact that rod functioning predominates during dark adaptation, resulting in poor acuity
D
the fact that cone functioning predominates during dark adaptation, resulting in poor acuity
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Question 48
Multiple Choice

 The stimuli used in the preferential looking technique of testing infant acuity are _____ .

Choose correct answer/s
A
geons
B
gratings?
C
greebles
D
graftings
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Question 49
Multiple Choice

 Acuity develops to almost 20/20 vision by the time the infant is _____ .

Choose correct answer/s
A
one month old
B
two months old
C
one year old
D
two years old
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Question 50
Multiple Choice

 Which of the following is a reason for the poor acuity of newborns

Choose correct answer/s
A
The rods are not developed at birth.
B
Newborns have too much visual pigment in the cones.
C
A newborn's rods have very narrow inner segments.
D
The visual cortex of the newborn is only partially developed.
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Question 51
Essay

 Name and define three kinds of focusing problems.

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Question 52
Essay

Discuss the major differences between the rods and the cones.
(b) Describe two retinal disorders that differentially affect the rods and the cones.

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Question 53
Essay

What is the "blind spot"
(b) Discuss two reasons why we are not usually aware of the blind spot.

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Question 54
Essay

Draw a graph (with appropriate axis labels) of the dark adaptation curve.
(b) Describe the methodology used to isolate the rod component of the curve, and the cone component.

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Question 55
Essay

 What are the basic properties of action potentials

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Question 56
Essay

 Describe the process of synaptic transmission. Include in this description the differences between excitatory and inhibitory transmitters.

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Question 57
Essay

 Using words and/or diagrams, describe circuits with (a) no convergence and (b) convergence.

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Question 58
Essay

In words and/or diagrams, discuss why convergence of the rods results in increased sensitivity, but decreased acuity.
(b) In words and/or diagrams, discuss why the lack of convergence in the foveal cones results in decreased sensitivity, but increased acuity.

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Question 59
Essay

 Describe how preferential looking and visual evoked potentials technique have been used to study infant perception.

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