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Wakefulness and Sleep- True or False

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Question
Answer
Animals produce endogenous circadian rhythms that last about a day.   True  
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The dominant zeitgeber for animals is light.   True  
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Blind and deaf animals do not have circadian rhythms.   False  
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Changes in EEG waves occur when neurons fire in synchrony.   True  
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Dreams only occur in REM sleep.   False  
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The onset of sleep requires active brain brain processes.   True  
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The regular use of tranquilizers can result in insomnia.   True  
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Narcolepsy is a condition characterized by frequent periods of sleepiness during the day.   True  
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In general, animals that have the most total sleep also have the highest percentage of REM sleep.   True  
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The activation-synthesis theory of dreams argues that dreams are the result of random brain activity.   True  
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