Biological Rhythms (OCR A-Level Psychology): Flashcards
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What 2 factors regulate biological rhythms?
What 2 factors regulate biological rhythms?
Endogenous pacemakers & exogenous zeitgebers
Endogenous pacemakers definition
Endogenous pacemakers definition
Internal body clocks that govern biological rhythms
Example of endogenous pacemaker
Example of endogenous pacemaker
SCN (suprachiasmatic nucleus)
Exogenous zeitgebers definition
Exogenous zeitgebers definition
External environmental changes that reset the body clock
Examples of exogenous zeitgebers
Examples of exogenous zeitgebers
Light, noise
Aschoff & Wever study location
Aschoff & Wever study location
WWII bunker deprived of natural light
Aschoff & Wever study duration
Aschoff & Wever study duration
Four weeks
Aschoff & Wever key finding
Aschoff & Wever key finding
All but one participant had 24-25 hr rhythm
Natural sleep-wake cycle length
Natural sleep-wake cycle length
Slightly longer than 24 hours
Role of exogenous zeitgebers
Role of exogenous zeitgebers
Synchronise internal clock to 24-hour day
Limitation of isolation studies
Limitation of isolation studies
Pacemakers & zeitgebers can't be studied in isolation
Pacemakers & zeitgebers in everyday life
Pacemakers & zeitgebers in everyday life
They interact; separating them makes little sense