Thursday, January 15, 2009

cells make you old?

A new study puts evidence behind the old adage that stressful experiences can give a person gray hairs. Scientific data now indicate that prolonged psychological stress might cause a person's cells to age, and possibly die, significantly faster than normal.Previous research had shown that protein-DNA complexes called telomeres serve as a cell's timekeeper, telling it how long to live. Telomeres protect the ends of chromosomes, much as plastic tips protect shoelaces. Each time a cell divides, enzymes chew off a tiny portion of its telomeres. When the caps are whittled down to nubs, cells cease dividing and soon die.

I did not know that stress makes you look, feel, and be older. Well when i read this passage i found out the the more me and you get stressed out, the more old we look and feel. I know I can not afford plastic surgery, and the only way I know to prevrevent form looking older is to let things that don't matter in life go in one ear and out the other.

Want to read more you can go to the following page and read what i read to find out how to look yonger and who wrote this amazing messeage about cells.
http://www.phschool.com/science/science_news/articles/stressed_to_death.html

vocabulary words I do not know!

Telomeres -|ˈtēləˌmi(ə)r; ˈtelə-|-noun genetics- a compound structure at the end of a chromosome. DERIVATIVES tel-o-mer-ic |ˌtēləˈmerik; ˌtelə-| |ˈtiləˈmɛrɪk| adjective ORIGIN 1940s: from Greek telos ‘end’ + meros ‘part.' Telomere is a region of repetitive DNA at the end of chromosomes, which protects the end of the chromosome from destruction. Its name is derived from the Greek nouns telos (τἐλος) "end" and merοs (μέρος, root: μερεσ-) "


Mononucleocytsis -|ˌmänəˌn(y)oōklēˈōsəs|
noun Medicine
an abnormally high proportion of monocytes in the blood.
• short for infectious mononucleosis . Also called mono .
Mononucleosis is a condition where there is an unusual proliferation of monocytes.[1] It is similar in meaning to monocytosis.
Sometimes the use of the term implies EBV infectious mononucleosis, but it is also possible for cytomegalovirus to cause mononucleosis

telomerase -|təˈläməˌrās; təˈlō; -ˌrāz|
noun
an enzyme that adds nucleotides to telomeres, especially in cancer cells.
Telomerase is an enzyme that adds specific DNA sequence repeats ("TTAGGG" in all vertebrates) to the 3' ("three prime") end of DNA strands in the telomere regions, which are found at the ends of eukaryotic chromosomes. The telomeres contain condensed DNA material, giving stability to the chromosomes. The enzyme is a reverse transcriptase that carries its own RNA molecule, which is used as a template when it elongates telomeres, which are shortened after each replication cycle. Telomerase was discovered by Carol W. Greider and Elizabeth Blackburn in 1984 in the ciliate Tetrahymena.[1] There are some indicators that telomerase is of retroviral origin

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