The Demand for Sleep (VCE SSCE Psychology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What time period do circadian rhythms coordinate body activities over?
What time period do circadian rhythms coordinate body activities over?
24 hours
Without external cues, the circadian rhythm naturally 'free-runs' at approximately what duration?
Without external cues, the circadian rhythm naturally 'free-runs' at approximately what duration?
24.25 hours
Which is the most powerful zeitgeber for synchronizing circadian rhythms?
Which is the most powerful zeitgeber for synchronizing circadian rhythms?
Light
Ultradian rhythms coordinate body activities over what time period?
Ultradian rhythms coordinate body activities over what time period?
Periods shorter than 24 hours
How many sleep cycles occur during a typical 8-hour sleep episode?
How many sleep cycles occur during a typical 8-hour sleep episode?
5 cycles
How long does each sleep cycle typically last?
How long does each sleep cycle typically last?
90 minutes
What is the function of the suprachiasmatic nucleus (SCN)?
What is the function of the suprachiasmatic nucleus (SCN)?
Master body clock
Which gland releases melatonin into the bloodstream?
Which gland releases melatonin into the bloodstream?
Pineal gland
What are the primary effects of melatonin on the body?
What are the primary effects of melatonin on the body?
Induces drowsiness & decreases activity
What happens when the eyes detect low or no light?
What happens when the eyes detect low or no light?
SCN signals increased melatonin release