Endogenous and Exogenous zeitgebers

• What are Endogenous Zeitgebers?


  Internal biological cues that regulate our circadian rhythms. Examples: brain's internal clock, hormone release, natural sleep-wake cycle.
• What are Exogenous Zeitgebers?


  External cues that regulate our circadian rhythms. Examples: light and darkness, social interactions, meal times, eating patterns.
• Endogenous vs Exogenous


  Endogenous: comes from within the body. Exogenous: comes from outside the body.
• Internal Clock vs External Cues


  Internal Clock (Endogenous): regulates our circadian rhythms. External Cues (Exogenous): influences our sleep-wake cycles.