Psychology 0.0 / 5 ? PsychologySleepA2/A-levelAQA Created by: faith_17Created on: 10-03-16 10:32 Rhythm that occurs once every 24 hours Circadian 1 of 6 Siffre spent this amount of time in a cave Seven 2 of 6 internal rhythm endogenous pacemaker 3 of 6 external time giver exogenous zeitgeber 4 of 6 a hormone secreted in ressponse to light melatonin 5 of 6 The main endogenous pacemaker suprachiasmatic nucleus 6 of 6
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