#1
What is the approximate duration of a full sleep cycle?
90 minutes
ExplanationA full sleep cycle typically lasts around 90 minutes.
#2
During which stage of sleep do most dreams occur?
REM (Rapid Eye Movement) sleep
ExplanationMost dreams occur during REM (Rapid Eye Movement) sleep.
#3
What is the term for the inability to move or speak during sleep onset or upon waking up?
Sleep paralysis
ExplanationSleep paralysis refers to the inability to move or speak during sleep onset or upon waking up.
#4
Which neurotransmitter is associated with promoting sleep and relaxation?
Serotonin
ExplanationSerotonin is associated with promoting sleep and relaxation.
#5
What is the term for the study of dreams and their meanings?
Oneirology
ExplanationThe study of dreams and their meanings is called oneirology.
#6
During which stage of sleep do sleepwalking and night terrors typically occur?
NREM (Non-Rapid Eye Movement) sleep
ExplanationSleepwalking and night terrors typically occur during NREM (Non-Rapid Eye Movement) sleep.
#7
What is the term for the sudden muscle contractions or jerks that sometimes occur during the transition from wakefulness to sleep?
Hypnagogic jerks
ExplanationSudden muscle contractions or jerks that sometimes occur during the transition from wakefulness to sleep are called hypnagogic jerks.
#8
Which sleep disorder is characterized by an irresistible urge to sleep during the day?
Narcolepsy
ExplanationAn irresistible urge to sleep during the day characterizes narcolepsy.
#9
What is the term for the condition of experiencing vivid and frightening hallucinations upon waking up?
Hypnopompic hallucinations
ExplanationExperiencing vivid and frightening hallucinations upon waking up is termed hypnopompic hallucinations.
#10
Which sleep stage is characterized by a transition from wakefulness to sleep, often accompanied by theta brain waves?
Stage 1
ExplanationStage 1 sleep is characterized by a transition from wakefulness to sleep, often accompanied by theta brain waves.
#11
During which stage of sleep does sleepwalking commonly occur?
Stage 2
ExplanationSleepwalking commonly occurs during Stage 2 sleep.
#12
What is the term for the phenomenon of waking up and recalling a dream in great detail?
Dream recall
ExplanationThe phenomenon of waking up and recalling a dream in great detail is termed dream recall.
#13
What is the phenomenon of waking up in the middle of the night and having difficulty falling back asleep called?
Nocturnal awakening
ExplanationWaking up in the middle of the night and having difficulty falling back asleep is called nocturnal awakening.
#14
What is the term for the recurring inability to breathe properly during sleep?
Sleep apnea
ExplanationThe recurring inability to breathe properly during sleep is called sleep apnea.
#15
Which hormone is associated with regulating the sleep-wake cycle?
Melatonin
ExplanationMelatonin is associated with regulating the sleep-wake cycle.
#16
In what stage of sleep are the brain waves slow and large, indicating deep sleep?
Delta sleep
ExplanationSlow and large brain waves indicating deep sleep occur in Delta sleep.
#17
What is the term for the phenomenon of waking up and being unable to recall any dreams?
Dreamlessness
ExplanationThe phenomenon of waking up and being unable to recall any dreams is termed dreamlessness.
#18
Which part of the brain is particularly active during REM (Rapid Eye Movement) sleep?
Amygdala
ExplanationThe amygdala is particularly active during REM (Rapid Eye Movement) sleep.
#19
What is the primary function of dreaming, according to the activation-synthesis theory?
Random neural activity
ExplanationAccording to the activation-synthesis theory, the primary function of dreaming is random neural activity.
#20
What is the term for the tendency to experience sudden muscle weakness or paralysis during strong emotions, often occurring during dreams?
Cataplexy
ExplanationThe tendency to experience sudden muscle weakness or paralysis during strong emotions, often occurring during dreams, is called cataplexy.
#21
Which neurotransmitter is associated with promoting wakefulness and alertness?
Dopamine
ExplanationDopamine is associated with promoting wakefulness and alertness.
#22
What is the term for the natural, internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours?
Circadian rhythm
ExplanationThe natural, internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours is called circadian rhythm.
#23
Which sleep disorder is characterized by repeated episodes of stopped breathing during sleep?
Sleep apnea
ExplanationSleep apnea is characterized by repeated episodes of stopped breathing during sleep.
#24
In what stage of sleep does sleep paralysis commonly occur?
REM (Rapid Eye Movement) sleep
ExplanationSleep paralysis commonly occurs during REM (Rapid Eye Movement) sleep.
#25
What is the term for the experience of waking up and being unable to move for a short period?
Sleep paralysis
ExplanationThe experience of waking up and being unable to move for a short period is termed sleep paralysis.