Question 1
Question
Animals produce endogenous circadian rhythms that last about a day
Question 2
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The dominant zeitegeber for land animals is light.
Question 3
Question
Blind and deaf animals do not have circadian rhythms
Question 4
Question
The biological clock depends on part of the hypothalamus, called the suprachiasmatic nucleus
Question 5
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Changes in EEG waves occur when neurons fire in synchrony
Question 6
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Dreams only occur during REM sleep
Question 7
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The regular use of tranquillisers can result in insomnia
Question 8
Question
Narcolepsy is a condition characterised by frequent periods of sleepiness during the day
Question 9
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In general, animals that have the most total sleep also have the highest percentage of REM sleep
Question 10
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The activation-synthesis theory of dreams argues that dreams are the result of random brain activity
Question 11
Question
If a migratory bird is kept in a laboratory room with constant temperature and 12 hours of light each day, when does it show migratory readiness?
Question 12
Question
Circadian cycles are to _____ as circannual cycles are to _____.
Answer
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Mating; hibernating
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Daily; yearly
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Light-Dark; temperature
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Endogenous; exogenous
Question 13
Question
Which of the following is most clearly under the control of a circadian rhythm in most animals?
Answer
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Migration
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Mating
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Sleep
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Storage of body fat
Question 14
Question
A human's body temperature over the course of 24 hours is usually highest:
Question 15
Question
Mammals have circadian rhythms:
Answer
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For sleep and body temperature only
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For a variety of activities, including sleep
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Only for their sleep/activity cycle
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Only for frequency of eating and drinking
Question 16
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What happens if people are put in an environment that is constantly light?
Answer
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They complain that they have difficulty waking up
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They follow a cycle closer to 28 hours than to 24 hours
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It does not affect them in any way
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They complain that they cannot sleep
Question 17
Question
An astronaut orbiting the dart experiences 45-minute periods of daylight alternating with 45 minutes of darkness. What is likely to happen?
Answer
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They are able to sleep during rest periods
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They sleep poorly during rest periods
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The alternating patterns allow for normal rhythm development
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They are fully alert during wakeful periods
Question 18
Question
What happens if people live in an environment in which the cycle of light and dark is other than 24 hours?
Answer
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They adjust better if the cycle is close to 24 (e.g., 25)
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They fail to adjust at all
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Within a few days, they adjust to waking and sleeping on the new schedule, whatever it is
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They adjust better if the cycle is some multiple of 24 (e.g., 48)
Question 19
Question
Research on circadian rhythms has shown that one of the best ways to increase the alertness and efficiency of workers on night shifts is to:
Answer
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Have them eat a big meal before going to sleep
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Allow them to catnap
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Expose them to bright lights while they work
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Keep the environmental temperature constant from night to day
Question 20
Question
The surest way to disrupt the biological clock is to damage the:
Answer
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Lateral hypothalamus
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Suprachiasmatic nucleus
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Substantia nigra
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Caudate nucleus
Question 21
Question
The suprachiasmatic nucleus is found in the:
Answer
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Thalamus
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Hypothalamus
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Substantia nigra
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Caudate nucleus
Question 22
Question
The role of the suprachiasmatic nucleus (SCN) in the regulation of biological rhythms is to:
Answer
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Generate the circadian rhythm
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Generate the circannual rhythm
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Coordinate several biological clocks
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Feed visual information to the biological clock
Question 23
Question
The input form the eyes to the suprachiasmatic nucleus, responsible for shifting the phase of the circadian rhythm, originates from:
Question 24
Question
Slow-wave sleep is comprised of:
Answer
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Stage 3 and 4
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REM sleep
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Alpha wave sleep
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Stages 1 and 2
Question 25
Question
EEG waves are larger when brain activity decreases because:
Answer
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Neurons are becoming more desynchronised
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Blood flow is increasing
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The EEG measures muscle tension, which also decreases
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Neurons are becoming more synchronised
Question 26
Question
During REM sleep, the EEG shows:
Answer
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Regular, low-voltage slow waves
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Irregular, low voltage fast waves
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Regular, high-voltage slow waves
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Irregular, high-voltage slow waves
Question 27
Question
During sleep, what happens in the brain?
Answer
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Decreased firing by dopamine neurons
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Increased firing by GABA neurons
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Cessation of spontaneous activity in neurons
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Increased firing by dopamine neurons
Question 28
Question
What are the dreamlike experiences at the onset of sleep that are difficult to distinguish from reality?
Answer
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Occipital illusions
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Pseudo-psychedelic visions
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Hypnagogic hallucinations
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Idiopathic-hallucinations
Question 29
Question
Loss of orexin-containing neurons in the hypothalamus may contribute to:
Question 30
Question
According to the evolutionary perspective of sleep, the primary function of sleep is to:
Answer
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Restore body functions that were exhausted during wakefulness
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Enable the person to re-experience, in dreams, the events of the past
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Conserve energy
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Promote brain development
Question 31
Question
Research suggests that _____ sleep is the most important for strengthening memories of motor skills
Answer
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Deep
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REM
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Stage II
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Stage I
Question 32
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During dreaming, which of the following area(s) continue to be highly active?
Answer
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The areas of the prefrontal cortex that are key to working memory
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The primary visual cortex and primary auditory cortex
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The hypothalamus, amygdala, and other emotional areas
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The primary motor cortex in the precentral gyrus
Question 33
Question
A free-running rhythm is a rhythm that:
Answer
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Occurs when specific stimuli reset or alter it
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Occurs when stimuli do not alter it
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Occurs when stimuli reset or alter it
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Occurs when no stimuli reset or alter it
Question 34
Question
After damage to the suprachiasmatic nucleus, the body:
Answer
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Cannot generate biological rhythms
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Still has rhythms in synchrony with environmental patterns of light and dark
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Still has rhythms, but they are less consistent
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Still has rhythms, but they can only be reset by artificial light
Question 35
Question
The role of the suprachiasmatic nucleus (SCN) in the regulation of biological rhythms is to:
Answer
-
Coordinate several biological clocks
-
Feed visual information to the biological clock
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Generate the circadian rhythm
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Generate circannual rhythms
Question 36
Question
The retinohypothalamic pathway receives input from the:
Question 37
Question
When do secretions of melatonin begin?
Answer
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Just before a person wakes
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When body temperature is at its lowest
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When body temperature is at its highest
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A couple of hours before a person naturally falls asleep
Question 38
Question
Alpha waves are characteristic of what type of activity?
Question 39
Question
What are symptoms of paradoxical sleep?
Answer
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Alpha waves
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Stages 1 and 2
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Stages 3 and 4
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REM sleep
Question 40
Question
The _____ is a structure that extends from the medulla into the forebrain
Answer
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Reticular formation
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Tectum
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Tegmentum
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Thalamus
Question 41
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In response to meaningful events, the locus coeruleus releases:
Answer
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Norepinephrine
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Acetylcholine
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Dopamine
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Serotonin
Question 42
Question
REM sleep is associated with:
Question 43
Answer
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Involuntary movements of the arms and legs during sleep
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Inability to breathe while sleeping
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Tendency to fall asleep suddenly during the day
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Same as sleep-talking
Question 44
Question
What is narcolepsy?
Answer
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Sleepwalking
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The inability to breathe while sleeping
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Involuntary movements of the limbs while sleeping
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Sudden periods of sleepiness during the day
Question 45
Question
The biological clock depends on part of the hypothalamus called the:
Question 46
Question
Which stage of sleep involves sleep spindles, K-complexes and bursts of 12-14 Hz waves
Answer
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a. Stage 1
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b. Stage 2
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c. Stages 3 & 4
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d. REM sleep
Question 47
Question
Which of the following are possible reasons for why we sleep FALSE?