WorksheetsSleep and Wake Cycles
Total questions: 28
Worksheet time: 13mins
What was the purpose of Siffre's experiment?
To analyze the effects of diet on sleep quality
To investigate the influence of endogenous factors and zeitgebers on the sleep-wake cycle
To determine the impact of technology on sleep-wake cycles
To study the effects of natural light on sleep patterns
How long did Siffre spend in the dimly lit cave for his experiment?
6 months
3 months
1 month
2 months
What was the duration of Siffre's sleep-wake cycle at the end of the experiment?
24 hours
26 hours
25 hours
23 hours
What was the only form of contact with the outside world that Siffre had during the experiment?
Email communication
Letters
Phone calls
Video conferencing
What was the absence in the cave that affected Siffre's sleep pattern?
Natural light
Food
Clock
Technology
Siffre found that the average circadian rhythm is how many hours long?
What type of rhythm is the sleep cycle?
Infradian
Circadian
Ultradian
Which stage of sleep is characterized by rapid eye movements and dreaming?
Stage I
Stage II
Stage III
REM sleep
What is the main cause of insomnia?
Stress or anxiety
Excessive sleepiness during the day
Irregular sleep schedule
Excessive caffeine intake
The pattern of physical and behavioral changes that follows a 24 hour cycle, in accordance with the hours of light and darkness.
REM
NREM
circadian rhythm
ultradian rhythm
The stages of sleep are differentiated from each other by
varying levels of adrenaline found in the blood
varying patterns of brain activity
whether you are dreaming or not.
your core body temperature
A hormone released by the pineal gland that increases feelings of relaxation and tiredness
dopamine
melatonin
SCN
serotonin
melatonin can be defined as a sleep-inducing hormone released by the penial gland
True
Fales
Circadian rhythm is defined as...
A type of bio rhythm, subject to a 24 hour cycle which regulates bodily processes
A type of rhythm with a frequency of one per year
A type of rhythm with a frequency of less than one cycle per 24 hours
A type of rhythm with a frequency of more than one cycle per 24 hours
The correct term for when biological rhythms are matched to environmental triggers
Entertainment
Endogenous pacemaker
Exogenous zetgerbers
Entrainment
an endogenous rhythm is
driven by external stimuli
is internally driven from your pacemaker system
requires external cues
stops occurring in constant conditions e.g. in a dark cave
In the evening the SCN causes:
increase in melatonin, decrease in body temperature, decrease in blood pressure.
increase in melatonin, increase in body temperature, increase in blood pressure.
decrease in melatonin, decrease in body temperature, decrease in blood pressure.
decrease in melatonin, increase in body temperature, increase in blood pressure.
the SCN is
Endogenous pacemaker
Exogenous Zeitgeber
The SCN receives information from the
olfactory nerve
optic nerve
auditory nerve
gustatory nerve
Which hormone makes us feel sleepy?
adrenaline
cortisol
melatonin
serotonin
Light is an example of what:
endogenous zeitgeiber
endogenous pacemaker
exogenous zeitgeiber
exogenous pacemaker
