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Aging case study

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.....Wr..........
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biology
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London

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Young W.
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documents in English
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case study
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  1. Introduction
  2. How and why should we fight against this aging brain?
  3. Brain aging and memory
  4. Two theories of aging
  5. The fight against brain aging
  6. Conclusion

Aging, also known as senescence, is a physiological process that causes a slow deterioration of the functions of the body. It is characterized general degradation capacity of the body: Psychomotor, immune or reproductive. He 'spares no area of the human body, whether skin, bones, muscles but also the brain. This is called brain aging. This begins with the sl age of 20 years, but only occurs much later, around 60 to 65 year old.

Memory plays a primary role in the life of every human being. It is at the origin of knowledge, of intelligence, of the identity of each and intervenes in the essence of our business.

There are three main types of memory: Short-term memory, long term memory and sensory memory. The first in between it's is the one that allows us to remember things for a few tens of seconds, while the long-term memory allows us to remember it for hours, days, months or even years. However, all the memories do not pass the short-term memory to long term memory. This passage does is only possible if the hippocampus, a particular area of the brain is active. It makes possible the most durable registration of certain memories. Finally, the sensory memory is extremely brief and appeals to the senses, especially sight and hearing.

[...] An inhibitor is a substance that decreases the rate of a reaction catalyzed by an enzyme . By binding to an enzyme, an inhibitor can prevent the attachment of the substrate to the active site , or cause deformation of the enzyme that renders it inactive. The inhibitors of telomerase s decision in so would a great help in the fight against cancer cells that abounds telomerase Tips to adopt at a young age If our loved since childhood or even the media s we advise eating at least 5 fruits and vegetables per day, lis is not for nothing ! [...]


[...] The Russian biologist Aleskeï Olovnikov develops this theory in 1971 by relying on earlier discoveries. According to him, aging is due to the shortening of telomeres. Telomeres are chromatin structures comprise repetitive sequences of non-coding DNA that protect the ends of linear eukaryotic chromosomes from any form of damage. Diagram : A chromosome and DNA According to the biologist, after each new replication cycle that precedes mitosis, cells lose some of their telomeric DNA, due to the inability of DNA polymerase to copy the last nucleotides. [...]


[...] Cervical electrical activity is a reflection of brain metabolic activity, it shows that Centrophenoxine really is a neuro-energizing The telomerase inhibitors Telomerase is an enzyme that, during the replication of the DNA in eukaryotic , allows to keep the length of the chromosome by adding a specific structure to each end : The telomere .Although composed of deoxyribonucleotides like the rest of the chromosome, the telomere is synthesized according to a different mode of classical replication of DNA. The telomeraseribonucleoprotein are that catalyze the addition of a specific sequence repeated at the ends of chromosomes. The RNA component of telomerase is used as template for the synthesis ofDNA. The activity level cell telomerase is increased in cells cancerous . It is one of the factors contributing to the proliferation and immortalization of cancer cells. [...]


[...] Sometimes just a few things to give them to live, because the goal is not to prolong a life of suffering, but to improve their quality of life, to reintegrate them into the life of every day, show them that they can significantly improve their strength, mobility and independence. We have just seen that the means to fight against brain aging are many and varied. Take a disease and then seeing how we can stop the process of getting older ement s. III / Bibliography Web : - www.mondeo.fr/index.php?option=com_content&task=view &id=204&Itemid=1&ed=23 - www.wikipedia.fr - www.masantenaturelle.com/chroniques/dossier/prevenir -vieillissement.php - www.imaage-paris.com/actu/article.php3?id- article=1041 - www.ateliersante.ch/cerveau.htm - www.qiqcm.com/ - www.sante-naturelle.info/vieillissement . [...]


[...] Currently, aging is seen as two major theories about cell physiology. - The mitochondrial theory. This theory is also called free radical theory. It was developed in 1954 by Denham Harman, chemist, biologist and physician gerontologist. Free radicals are atoms and reactive molecules having one or more unpaired electrons in their outer layer, which makes it unstable. These molecules are seeking to stabilize and for this ownership electrons from other molecules that previously were stable and therefore become unstable in turn. It happens a reaction cha î do. [...]

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