HPL Q06 - Sleep Flashcards
Sleep taken at times when the temperature is […………….] will be longer and more refreshing than sleep taken when the temperature is […………….].
[falling] [rising]
Circadian rhythm is:
a.a biological cycle controlled by a 24hr internal clock in the brain that regulates behavioural and physiological changes
b.a physiological state in which there is a decreased capacity to perform cognitive tasks and an increased variability in performance
c.a natural drive to sleep that increases as the day progresses which also affects the ability to sustain attention
d.a period of impaired cognitive performance and reduced vigilance following awakening from a regular sleep episode
a.a biological cycle controlled by a 24hr internal clock in the brain that regulates behavioural and physiological changes
How many periods of REM sleep are experienced during a normal 8 hour sleep?
a.6 - 7
b.2 - 3
c.4 - 5
d.8 - 9
c.4 - 5
Regarding circadian dysrhythmia (jet lag), which of the following statements is true?
a.Circadian adaption is unlikely to occur during long haul trips of more than 24 hours
b.The rate of adaption depends on the number of time zones crossed and the direction of travel
c.The rate of adaption is independent of the direction and duration of travel
d.There is a prescriptive formula for calculating a precise number of days needed for circadian adaption
b.The rate of adaption depends on the number of time zones crossed and the direction of travel
How much sleep would be required to recover from a period of lost sleep?
a.half the duration of the period of lost sleep
b.Three quarters of the duration of the period of lost sleep
c.Twice the duration of the period of lost sleep
d.The same duration as the period of lost sleep
d.The same duration as the period of lost sleep
During paradoxical sleep:
Select one:
-respiration is very regular.
-the rhythm of the heart is very regular.
-physical restoration and recuperation takes place.
-rapid eye movements can be observed.
-rapid eye movements can be observed.
How many stages of orthodox (non rapid eye movement) sleep are there and what percentage of sleep is found in stage 2?
a.4 stages, 25%
b.4 stages, 50%
c.2 stages, 50%
d.5 stages, 90%
b.4 stages, 50%
The circadian rhythm is mostly determined by
a.metabolic rate
b.body temperature
c.blood pressure
d.melatonin secretion
b.body temperature
If an individual is isolated from the common Zeitgebers, circadian rhythms will ‘free run’ to a periodicity of approximately:
a.25 hours
b.36 hours
c.16 hours
d.24 hours
a.25 hours
The sleep cycles repeat during the course of a night’s sleep.
- Each succeeding cycle contains a greater amount of REM sleep.
- Frequent interruption of the REM sleep may be harmful.
Which statement(s) is/are correct?
Select one:
-1 and 2 are both correct
-1 is correct, 2 is false
-1 and 2 are both false
-1 is false, 2 is correct
-1 and 2 are both correct
