The internal body clock
The internal body clock
An endogenous pacemaker is an internal body clock that controls biological rhythms such as the sleep-wake cycle. Endogenous means that it originates inside the body, so the rhythm continues even when external time cues are removed.
Step-by-step lessons on OCR GCSE Psychology 6.1.3 Endogenous pacemakers and exogenous zeitgebers. Each one builds up to exam-style questions. Start with the more concrete topics like memory and development before tackling evaluation-heavy topics like psychological problems and criminal psychology.