Salma Ahmed
English Lit. GCSE Student
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Describe and assess the consequences of disrupting biological rhythms
- Words:
- 939
- Submitted:
- Thu Jan 13 2005
Have a little read: ... DESCRIBE AND ASSESS THE CONSEQUENCES OF DISRUPTING BIOLOGICAL RHYTHMS (24 MARKS) All living organisms experience rhythmic changes, which tend to coincide with seasonal or daily environmental changes. These rhythms are known as biological rhythms, which include circadian, ultradian and infradian types. Circadian rhythms are those that repeat themselves daily, those lasting 'about one day'. The best example of a circadian rhythm is the sleep-wake cycle, associated with which are many cyclical changes with active and dormant periods, for instance body temperature and urine production. These rhythms allow animals to prepare for predictable daily environmental changes, such as night and day. Ultradian rhythms are those cycles with less than one day. Examples include levels of alertness throughout the day and the cycle of brain activity during sleep. Infradian rhythms are those with a period of greater than a day. The menstrual cycle is an example of an infradian rhythm. Infradian rhythms that occur as
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