Endogenous Pacemakers & Exogenous Zeitgebers (AQA A-Level Psychology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What are endogenous pacemakers?
What are endogenous pacemakers?
Internal biological clocks
Where is the suprachiasmatic nucleus (SCN) located in the brain?
Where is the suprachiasmatic nucleus (SCN) located in the brain?
In the hypothalamus
When does the pineal gland increase production of melatonin?
When does the pineal gland increase production of melatonin?
During darkness
In DeCoursey's study, what was the mortality rate for SCN-lesioned chipmunks in the first 14 days?
In DeCoursey's study, what was the mortality rate for SCN-lesioned chipmunks in the first 14 days?
50%
What happened when Ralph et al. transplanted SCN cells from mutant hamsters into normal hamsters?
What happened when Ralph et al. transplanted SCN cells from mutant hamsters into normal hamsters?
Recipients adopted the 20-hour cycle
What is the primary zeitgeber in humans?
What is the primary zeitgeber in humans?
Light
In Campbell & Murphy's study, by how much could sleep/wake cycles be shifted using light on knees?
In Campbell & Murphy's study, by how much could sleep/wake cycles be shifted using light on knees?
Up to 3 hours
At what age do most babies show entrainment of their circadian rhythms?
At what age do most babies show entrainment of their circadian rhythms?
Approximately 16 weeks
Which type of jet lag is generally more troublesome to adjust to?
Which type of jet lag is generally more troublesome to adjust to?
Phase advance (flying west to east)
Without external synchronisation, what cycle length do humans naturally adopt?
Without external synchronisation, what cycle length do humans naturally adopt?
24.5 or 25 hours