ENDOGENOUS PACEMAKERS ESSAY

Discuss the Role of Endogenous Pacemakers Discuss the role of endogenous pacemakers in the control of circadian rhythms [AO1 8 marks, AO2 16 marks] An endogenous pacemaker is an internal biological clock that controls the way in which many of our biological rhythms behave. His findings showed that the free running cycle settled down to a regular rhythm which is little over 24 hours. This study shows that the circadian rhythm persists without the cues of natural light, which demonstrates the existence of an endogenous clock. How to cite this page Choose cite format: We use cookies to give you the best experience possible. A limited time offer!

The normal hamsters the began to display the 20 hour circadian rhythm of the mutant hamster. How to cite this page Choose cite format: Discuss the Role of Endogenous Pacemakers Discuss the role of endogenous pacemakers in the control of circadian rhythms [AO1 8 marks, AO2 16 marks] An endogenous pacemaker is an internal biological clock that controls the way in which many of our biological rhythms behave. This study shows that the circadian rhythm persists without the cues of natural light, which demonstrates the existence of an endogenous clock. However this research may raise some ethical issues as it can be seen to breach the terms of animal cruelty, as it may cause the hamsters to become psychologically unhealthy.

endogenous pacemakers essay

Retrieved May 22,from https: However this study can be criticized as it is only a case study of one man, meaning it lacks population sesay and cannot be generalised to the wider population. This happens even when our eyes are shut, due to them being so thin, meaning that if our endogenous clocks are slow e. This study was supported by Aschoff and Wever who placed participants in an underground bunker without any external cuesand found that many participants displayed circadian rhythms of between 24 and fssay hours.

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The blind man was exposed to different exogenous zeitgebers such as clocks and social cues, but they found that none of these factors reduced his biological clock to 24 hours, and he had to take stimulants in the morning and sedatives at certain times at night to reduce his biological rhythm in time with the rest of the world.

Literature Review Dissertation chapter: An example of the way endogenous pacemakers control our circadian rhythms is a case study on Michael Siffre.

A limited time offer! At night, when there is no light, the SCN then sends a message to the pineal gland, causing it to increase the production of melatonin, which induces sleep by preventing the brains mechanism to promote wakefulness.

endogenous pacemakers essay

Discuss the Disruption of Biological Rhythms. Discuss the Role of Endogenous Pacemakers.

Discuss the Role of Endogenous Pacemakers

In conclusion, I think that endogenous pacemakers do play a very large role in helping to maintain our circadian rhythms, however this is also with the help of various exogenous zeitgebers which endobenous keep endogfnous rhythms precise.

The main endogenous pacemaker in mammals is the suprachiasmatic nucleus SCNwhich is located in the hypothalamus. Want to get a price estimate for your Essay? Discuss the Role of Endogenous Pacemakers Discuss the role of endogenous pacemakers in the control of circadian rhythms [AO1 8 marks, AO2 16 marks] An endogenous pacemaker is an internal biological clock that controls the way in which many of our biological rhythms behave.

Endogenous Pacemakers and Exogenous Zeitgebers Essay Plan – Document in A Level and IB Psychology

Discuss the role of endogenous pacemakers in the control of circadian rhythms [AO1 8 marks, AO2 16 marks] An endogenous pacemaker is an internal biological clock that controls the way in which many of our biological rhythms behave.

Get custom essay sample written according to your requirements Urgent 3h delivery pacemakwrs Order Now. We use cookies to give you the best pacemakerz possible. This study shows that the circadian rhythm persists without the cues of natural light, which demonstrates the existence of an endogenous clock.

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Discuss the Role of Endogenous Pacemakers | Free Essays –

Also the research can be criticized as it only shows the effect of the SCN on hamsters sleeping cycles and cannot be generalised to humans as hamsters have much smaller brains and are also nocturnal animals meaning that light does not effect their circadian rhythms, the same way it does ours.

The normal hamsters the began to display the 20 hour circadian rhythm of the mutant hamster. However some of the circadian pacemaksrs of those in the bunker were as long as 29 hours, showing that individual differences can effect the results meaning this study and the case study of Michael.

We will write a custom essay sample on Discuss the Role of Endogenous Pacemakers specifically for you.

Exogenous Zeitgebers and endogenous pacemakers essay

His findings showed that the free running cycle settled down to a regular rhythm which is little over 24 hours. This proves that endogenous pacemakers play a large role in circadian rhythms, as it showed that the sleep cycle in the hamsters depended on biological factors from with in the brain.

However this research may raise some ethical issues as it can be seen to breach the terms of animal cruelty, as it may cause the hamsters to become psychologically unhealthy.

How to cite this page Choose cite format: Siffre cannot be generalised to the wider population.