The Beginning Of The Perceptual Process

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Questions Bank

Introduction to Perception
The Beginning of the Perceptual Process
Neural Processing
Cortical Organization
Perceiving Objects and Scenes
Visual Attention
Taking Action
Perceiving Motion
Perceiving Color
Perceiving Depth and Size
Hearing I: Basic Processes and Pitch Perception
Hearing II: Location and Organization
Speech Perception
The Cutaneous Senses
The Chemical Senses

All Questions

Question 21

Multiple Choice

To isolate the rod portion of the dark adaptation curve, researchers _____ .

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use rod monochromats as the participants

present the stimulus foveally

present the stimulus in the periphery

use cone monochromats as participants

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Question 22

Multiple Choice

The "rod-cone break" in the dark adaptation curve occurs after about _____ in the dark.

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30 seconds

2 minutes

7 minutes

30 minutes

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Question 23

Multiple Choice

When visual pigments become bleached they are _____ .

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dead

fully regenerated

color sensitive

detached from the opsin

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Question 24

Multiple Choice

Rushton demonstrated that the physiological mechanism behind dark adaptation is _____ .

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visual pigment regeneration

the enzyme cascade

modular organization

photon remission

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Question 25

Multiple Choice

Cone spectral sensitivity is measured by having the observer _____ .

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look up and blink

look straight forward without blinking

look directly into a light

look to the side of a flashing light

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Question 26

Multiple Choice

The peak in the spectral sensitivity curve is about _ for the rods, and about _ for the cones.

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700 nm; 400 nm

450 nm; 800 nm

500 nm; 560 nm

600 nm; 450 nm

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Question 27

Multiple Choice

The Purkinje shift _____ .

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occurs when reds appear brighter than blues in well-lit conditions, but blues appear brighter than reds in dim conditions

occurs when blues appear brighter than reds in well-lit conditions, but blues appear brighter than reds in dim conditions

occurs when details that are easily seen in well-lit conditions become more difficult to see in low-light conditions

demonstrates the importance of eye movements in visual pigment regeneration

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Question 28

Multiple Choice

There are ____ different cone receptors, each with different absorption spectra.

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Question 29

Multiple Choice

The three major parts of a neuron are _____ .

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dendrites, cell body, and axon

axon, nerve fiber, and receptor

receptor, transmitter, and median

receptor, dendrites, and conductor

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Question 30

Multiple Choice

The difference in charge between the inside and the outside of the nerve fiber when the nerve is at rest is _____ mV.

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-70

-10

+19

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Question 31

Multiple Choice

Which of the following statements best defines the "propagated response"

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Once a response is triggered, the response travels the length of the axon without decreasing in amplitude.

Once a response is triggered, the response gradually increases in amplitude as it travels down the length of the axon.

The response increases the positive charge of the chlorine ions throughout the length of the axon.

The number of negative potassium ions increase the closer the impulse is to the dendrites.

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Question 32

Multiple Choice

As stimulus intensity is increased, recording from a single neuron shows that _____ .

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the amplitude of the action potential increases

the amplitude of the action potential decreases

the amplitude of the action potential may increase or decrease, depending on the stimulus

the rate of firing of the nerve fiber increases

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Question 33

Multiple Choice

The upper limit of a neuron's firing rate is estimated to be _____ impulses per second.

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100

800

4400

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Question 34

Multiple Choice

At the beginning of the action potential, _____ ions flow from outside the nerve fiber into the nerve fiber.

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positive potassium

negative potassium

positive sodium

negative sodium

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Question 35

Multiple Choice

The flow of ions that create the action potential are caused by the changes in the _____ of the nerve fiber.

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suppression

permeability

accommodation

assimilation

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Question 36

Multiple Choice

Synaptic vesicles contain chemicals called _____ that are released across the synapse to the next neuron.

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electrolytes?

collagens

neurotransmitters

glial cells

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Question 37

Multiple Choice

The _____ analogy is used to describe the relationship of neurotransmitters with receptor sites.

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"needle in a haystack"

"lock and key"

"stadium wave"

"rolling stone"

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Question 38

Multiple Choice

______ is the process by which inhibitory transmitters cause the inside of the neuron to become more negative.

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Hyperpolarization

Depolarization

Antipolarization

Repolarization

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Question 39

Multiple Choice

The rate of firing of the postsynaptic neuron depends on the amount of _____ input it receives from the presynaptic neuron.

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excitation

inhibition

equalization

both excitation and inhibition

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Question 40

Multiple Choice

_____ is necessary for the neural transmission and processing of information.

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Only inhibition

Only excitation

Only equalization

Both inhibition and excitation

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The Beginning Of The Perceptual Process

To isolate the rod portion of the dark adaptation curve, researchers _____ .

The "rod-cone break" in the dark adaptation curve occurs after about _____ in the dark.

When visual pigments become bleached they are _____ .

Rushton demonstrated that the physiological mechanism behind dark adaptation is _____ .

Cone spectral sensitivity is measured by having the observer _____ .

The peak in the spectral sensitivity curve is about _____ for the rods, and about _____ for the cones.

The Purkinje shift _____ .

There are ____ different cone receptors, each with different absorption spectra.

The three major parts of a neuron are _____ .

The difference in charge between the inside and the outside of the nerve fiber when the nerve is at rest is _____ mV.

Which of the following statements best defines the "propagated response"

As stimulus intensity is increased, recording from a single neuron shows that _____ .

The upper limit of a neuron's firing rate is estimated to be _____ impulses per second.

At the beginning of the action potential, _____ ions flow from outside the nerve fiber into the nerve fiber.

The flow of ions that create the action potential are caused by the changes in the _____ of the nerve fiber.

Synaptic vesicles contain chemicals called _____ that are released across the synapse to the next neuron.

The _____ analogy is used to describe the relationship of neurotransmitters with receptor sites.

______ is the process by which inhibitory transmitters cause the inside of the neuron to become more negative.

The rate of firing of the postsynaptic neuron depends on the amount of _____ input it receives from the presynaptic neuron.

_____ is necessary for the neural transmission and processing of information.

The peak in the spectral sensitivity curve is about _ for the rods, and about _ for the cones.