ENDOGENOUS PACEMAKERS ESSAY

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. 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. 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. Retrieved May 22, , from https: The main endogenous pacemaker in mammals is the suprachiasmatic nucleus SCN , which is located in the hypothalamus. We use cookies to give you the best experience possible. We will write a custom essay sample on Discuss the Role of Endogenous Pacemakers specifically for you.

This study shows that the circadian rhythm persists without the cues of natural light, which demonstrates the existence of an endogenous clock. However this study can be criticized as it is only a case study of one man, meaning it lacks population validity and cannot be generalised to the wider population. An example of the way endogenous pacemakers control our circadian rhythms is a case study on Michael Siffre. 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. Retrieved May 22, , from https:

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 25 hours. Discuss esasy Role of Endogenous Pacemakers.

endogenous pacemakers essay

This happens even when our eyes are shut, due to them being so thin, meaning that if our endogenous clocks are slow e. We use cookies to give you the best experience possible.

  BAND 5 RADIOGRAPHER PERSONAL STATEMENT

Discuss the role of endogenous pacemakers in control of one or more biological rhythms (8+16 marks)

His findings showed that the free running cycle settled down to endoenous regular rhythm which is little over 24 hours. Retrieved May 22,from https: 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 endogeous with the rest of the world.

Want to get a price estimate for your Essay? 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: 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. 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.

The main endogenous pacemaker in mammals is the suprachiasmatic nucleus SCNwhich is located endohenous the hypothalamus.

endogenous pacemakers essay

At night, when there is esssay 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. Discuss the Disruption of Biological Rhythms. However some of the circadian rhythms 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.

  APLS DISSERTATION AWARD

The normal hamsters the began to display the 20 endogenus circadian rhythm of the mutant hamster. 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 endogenouz brains and are also nocturnal animals meaning that light does not effect their circadian rhythms, the same way it does ours.

Discuss the Role of Endogenous Pacemakers | Free Essays –

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. Literature Review Dissertation chapter: 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 help keep the rhythms precise.

An example of the way endogenous pacemakers control our circadian rhythms is a case study on Michael Siffre. This study shows that the circadian rhythm persists pacemakrrs the cues of natural light, which demonstrates the existence of an endogenous clock.

However this study can be criticized as it is only a case study of one man, meaning it lacks population validity and cannot be generalised to the wider population. A limited time offer!

Siffre cannot be generalised to the wider population. We will write a custom essay sample on Discuss the Role of Endogenous Pacemakers specifically for you. Get custom essay sample written according to your requirements Urgent 3h delivery guaranteed Order Endogenohs.