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10 cards from this deck
Internal biological clocks controlling bodily rhythms
External factors synchronising internal clocks via entrainment
Suprachiasmatic nucleus
Primary internal timekeeper/master clock for sleep/wake cycle
Light
Hormone promoting sleepiness, produced in darkness
Around 16 weeks
24.5 or 25 hours
Getting up/bed earlier (west to east travel)
Getting up/bed later (east to west travel)
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