Biological Rhythms 0.0 / 5 ? PsychologyBiological RhythmsA2/A-levelAQA Created by: meCreated on: 28-12-13 13:39 The three types of biological rhythms circadian, infradian, ultradian 1 of 5 Circadian Occur every 24 hours E.G: sleep-wake cycle 2 of 5 Infradian Occur less frequently than once daily E.G: menstrual cycle 3 of 5 Ultradian Occur more than once daily E.G: sleep cycle (stages of sleep) 4 of 5 Endogenous Pacemakers: Internal Clock SCN acts as internal clock to keep body on 24 hour sleep-wake cycle 5 of 5
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