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Chapter 7 Self-test questions
Neuronal processing of sensory information
Quiz Content
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not completed
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Which of the following statements are correct? Please select all that apply.
Umwelt
is that part of the environment which is perceived after sensory and central filtering.
correct
incorrect
The
Umwelt
concept was formulated by Jakob von Uexküll.
correct
incorrect
Releasing mechanisms can be conceptualized as filters that reduce the information from the physical environment to the animal's
Umwelt
.
correct
incorrect
Umwelt
, as defined in ethology, encompasses the totality of the information present in the physical environment of an animal.
correct
incorrect
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Which of the following statements does
not
adequately describe supernormal stimuli?
Supernormal stimuli produce greater responses from an animal than do the natural sign stimuli.
correct
incorrect
When offered eggs of different sizes, oystercatchers prefer supernormal eggs.
correct
incorrect
The preference of oystercatchers for clutches with five eggs over normal clutches (which consist of three eggs) can be explained by the attractiveness of supernormal stimuli, as compared to the natural sign stimuli.
correct
incorrect
In humans, supernormal stimuli do not have any behavioral relevance.
correct
incorrect
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Which of the following statements characterizes best the relationship between releasers and motivation?
The effect of a releaser depends only on the stimulus properties but not on the motivation of the recipient.
correct
incorrect
Releasers have only immediate, releasing effects, but not tonic, motivational effects on the recipient.
correct
incorrect
The effect of a releaser depends on both the stimulus properties and the motivation of the recipient, and may include changes in both behavior and motivation of the recipient.
correct
incorrect
Absence of a behavioral change in an animal upon presentation of a releaser indicates the absence of any effect of this releaser on the recipient.
correct
incorrect
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Feature detection involves filtering of behaviorally irrelevant features of a complex sensory stimulus in order to extract behaviorally relevant features.
True
correct
incorrect
False
correct
incorrect
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Which of the following stimulus configurations defines unambiguously a 'worm' in the sensory world of toads?
An elongated object that moves in horizontal direction.
correct
incorrect
An elongated object that moves diagonally along its major axis.
correct
incorrect
An elongated object that moves vertically along its minor axis.
correct
incorrect
An elongated object that moves in vertical direction.
correct
incorrect
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not completed
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Which of the following statements about the optic tectum and thalamic-prectal area is
not
correct?
Electrical stimulation of the optic tectum elicits various behavioral patterns characteristic of feeding behavior.
correct
incorrect
Electrical stimulation of the thalamic-pretectal area elicits escape responses.
correct
incorrect
Lesions of the thalamic-pretectal area result in decreased selectivity of the T5(2) neurons of the optic tectum.
correct
incorrect
The thalamic-pretectal area and the optic tectum operate independently of each other.
correct
incorrect
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Which of the following statements about the auditory system of barn owls is
not
correct?
Barn owls locate sound in the azimuth by analyzing interaural time differences.
correct
incorrect
Barn owls locate sound in the elevation by analyzing interaural intensity differences.
correct
incorrect
If barn owls directly face a source of sound, the sound intensities perceived by the left and right ears are identical.
correct
incorrect
If barn owls directly face a source of sound, they can localize this source equally well in the horizontal plane and in the vertical plane.
correct
incorrect
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not completed
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Which of the following statements concerning the Lloyd Jeffress model are correct? Please select all that apply.
The computational model developed by Lloyd Jeffress provides an explanation for how the auditory system analyzes differences in the arrival times of sound at the two ears to estimate the direction of a source of sound in the azimuth plane.
correct
incorrect
According to the Jeffress model, asynchronous arrival of nerve impulses at coincidence detectors results in stronger firing of a given detector than synchronous arrival of such impulses.
correct
incorrect
In the Jeffress model, different coincidence detectors encode different interaural time differences.
correct
incorrect
Evidence for neural implementation of the Jeffress model has been obtained in the brain of barn owls, where neurons of the laminar nucleus serve as coincidence detectors, and axons arising from neuronal cells in the magnocellular nucleus function as delay lines.
correct
incorrect
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Which of the following statements about space-specific neurons in the acoustic system of barn owls is
not
correct?
In barn owls, space-specific neurons are found in the external nucleus.
correct
incorrect
Space-specific neurons respond to acoustic stimuli originating from the receptive field of these neurons.
correct
incorrect
Space-specific neurons respond selectively to specific combinations of interaural time and intensity differences.
correct
incorrect
The neural map formed by space-specific neurons is a linear representation of the auditory space in both azimuth and elevation.
correct
incorrect
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