- The suprachiasmatic nucleus and pineal gland are key endogenous pacemakers that regulate circadian rhythms
- Animal studies have shown the importance of the SCN in the sleep/wake cycle
- Light is a crucial exogenous zeitgeber that affects the circadian cycle
- The influence of other body clocks and the complexity of circadian rhythms should be considered
- Ethical considerations and environmental factors are important in evaluating the role of endogenous pacemakers and exogenous zeitgebers.
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