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31 Cards in this Set
- Front
- Back
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Amplitude refers to level of |
brightness |
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Wavelength refers to the type of |
hue |
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The higher the amplitude, the ________ the wave. |
taller |
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In terms of hue spectrum, less frequent wave length=______, higher frequent wave length=_____ |
red, violet |
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ordered projection of sensorysurface (e.g., retina) or effector system (e.g., musculature) to one or morestructures of central nervous system |
topographic map |
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A visual neuron’sreceptive field is the area of the _______ on which _____ must fall in order to affect the _______ of that neuron. |
retina;light;firing rate |
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Areas of loss of vision;Caused by lesion to appropriatetissue
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scotoma |
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conversion of energy from one form to another |
transduction |
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True or false: All sensory systems (vision,audition, olfaction, gustation, somatosensation)transduce physical energy into neural signals |
True |
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What does this image depict? |
Photoreceptor activity in light (top) and darkness(bottom) |
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Have cation channels that are openin the dark |
Photoreceptors |
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True or false: In darkness, ion channels are closed and glutamate release is stopped |
false, channels are open and glutamate is continuously released |
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When light strikes, rhodopsin splits into two parts called |
Rod opsin and retinal |
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The split of the rhodopsin molecule causes |
cation channels to close |
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After cation channels are closed in a photoreceptor, the membrane (depolarizes/hyperpolarizes) |
hyperpolarizes |
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What is this process depicting? |
From transduction to ganglion cells |
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In the dark, photoreceptors are constantly releasing glutamate which (hyperpolarizes/depolarizes) bipolar cell |
hyperpolarizes |
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When light strikes, rhodopsin bleaching hyperpolarizes photoreceptor membrane, photoreceptor releases glutamate, bipolar cell becomes (depolarized/hyperpolarized) |
depolarized |
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When light strikes and the bipolar cell becomes depolarized, it releases (more/less) NT |
more |
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The releasing of more NT by the bipolar cell causes the ganglion cell to (depolarize/hyperpolarize) |
depolarize |
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situationswhere multiple axons synapse with a single target neuron; can build up oversuccessive levels
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convergence |
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the ability to detect adifference in light intensity; higher sensitivity can see smaller difference
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sensitivity |
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the ability to see sharp focus, to distinguish tiny objects from each other and from their background |
acuity |
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High convergence= (high/low) sensitivity but (high/low) acuity |
high, low |
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Low convergence=(high/low) sensitivity but (high/low) acuity |
low, high |
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Does the bottom ganglion cell have high or low convergence? |
high |
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Is this a center-on,surround-off OR center-off, surround-on? |
center-on, surround off |
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center faster, surround slower |
center-on, surround-off |
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center slow, surround faster |
center-off, surround-on |
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When spot of light falls outside cell's receptive field, it has no effect on cell |
center-on, surround-off receptive field |
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True or false: a horizontal lines causes more APs than a vertical line |
false. A vertical line causes for APs. Because of its receptive field, a“simple cell” can detect lines of a particular orientation. Bar-shaped “on” area isconstructed from many centers of center-on, surround-off retinal receptivefields. |
