The Role of the Endogenous Pacemaker in the Control of the Cicadian Rhythm

THE ROLE OF THE ENDOGENOUS PACEMAKER IN THE CONTROL OF THE circadian RHYTHM. The bodys biological beatniks atomic function 18 controlled by an interaction between endogenous kitschy sinoatrial nodes (internal clocks) and exogenous zitegebers (external clock or cues). Animals and plants wipe out evolved endogenous pacemakers to serving maintain their natural bout with the environment, yet thither are fluctuations in the Earths cycle such as lifelong days in summer hence exogenous zitegebers help our body to take into account different fluctuations in our environment. two the endogenous pacemaker and the exogenous zitegibers control our circadian hertz which last for about a day, one drill of this is our simplicity kindle cycle. Studies done by Micheal Siffre where he spent prolonged time in ohmic resistance caves without exogenous zitegibers uniform sunlight, noise, clocks, etc necessitate supported the existence of endogenous pacemakers in our residuum c ome alive cycle as his results showed that his sleep wake rhythm settled to an average 24 hour cycle. However this plain could be criticized for lacking validity as it could be considered to be a case study hence it only describes the doings of one individual ( Micheal Siffre) and cannot be generalized to the population. In attachment to this, the conditions he faced in the caves such as arrange temperatures and the use of a dim light might baffle affected his sleep wake cycle. However Shiffres results are supported by various studies including Aschoff and Wever (1976) study where participants stayed in an underpass WWII bunker without exogenous zitegibers and the results showed that most of the participants displayed a sleep wake cycle of 24 to 25 hours. The main endogenous pacemaker in mammals is the Suprachiasmatic Nucleus (SCN); a cluster of nerve cells hard-bitten in the hypothalamus whose neurons have an in built circadian rhythm. It is perpetrate to the retina of the eye so it can detect the amount of su! nlight. It besides attached to the pineal gland; a small pea plant shaped...If you want to get a full essay, target it on our website: OrderEssay.net

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