biological rhythms
Internal timing cycles
Biological rhythms are the cyclical patterns that govern living organisms—sleep-wake cycles, heartbeats, hormone fluctuations, seasonal breeding.
The most familiar is the circadian rhythm, the roughly 24-hour cycle that regulates when we feel alert or drowsy.
Other rhythms operate on shorter scales (ultradian) or longer ones (infradian), like menstrual cycles or annual migration patterns.
Jet lag disrupts your biological rhythms.
- diurnalActive during daylight
- morning personOne who wakes easily
- heartbeatRhythmic cardiac contraction
- heart rateCardiac contractions per minute
- wakePath left in water
sleep schedule · hibernation · sleep-wake cycle · nocturnal · night owl · circadian · biological clock · rest · menstrual cycle · growth spurts · entrainment · attention spans · chronotype · migration patterns · sleep · melatonin · body temperature · cellular respiration
- physiologymetabolism, circulation, respiration, homeostasis, digestion
- cycleslife cycle, cycle, circle of life, cycles, period
- crime biologygenetic predisposition, twin studies, behavioral genetics, crime families, genetic risk
biological rhythmsconditioned responses
Learned automatic reactions
behavioral conditioning · cultural practices · social conventions