Originally posted by amolv06thanks, if this process was manipulated, so that shortening didn't take place, could it self perpetuate? Actually my motive here is to try to establish if it is indeed possible given the 'perfect', circumstances that perpetuation could take place, also is there an ageing gene - regards Robbie?
When DNA is replicated, it is slightly shortened. In order to not lose vital information coded in our DNA, there's a section of DNA in each chromosome known as a telomere. This is nothing but a repeated sequence of nucleotides which acts as a buffer to the coding region of our DNA. If the process of mitotic cell division were to continue indefinitely we w ...[text shortened]... ssary for survival.
This is just one reason that the process can not continue indefinitely.
Originally posted by robbie carrobieThis is what cancer is.
thanks, if this process was manipulated, so that shortening didn't take place, could it self perpetuate?
Originally posted by amolv06ok, please be patient for i am not a scientist nor very brainy! If i understand you correctly, what a 'cancer', does, is to completely replicate (no shortening) the DNA sequence code, manipulate it and then self replicate, producing cancerous cells! how insidious is that!
This is what cancer is.
The biological basis for aging is not at all well understood. Certainly there is a biological basis that takes us from prepubescence to adolescence to adulthood, however there is no consensus as to what causes old-age. Knowing this, I think it is safe to say that with out current understanding of the process we would be unable to combat the effects of aging.
Originally posted by amolv06thanks Amalov, even this small sojourn to the science forum has been enlightening - regards Robbie.
Sorry for the slow reply.
You are more or less correct about cancer. While a cancer does not completely copy DNA in the sense that regions of the telomere are clipped during dna replication, the cancer replaces the lost telomere region..
And I'm certainly unqualified to give you a meaningful opinion on what causes aging. There's certainly a genetic ...[text shortened]... to explain aging. There are many others. It may just as well be a combination of two or more.
Originally posted by robbie carrobieOne theory has it we would not survive more than a few thousand years even if immortality was given to all humans. The idea there is life is too arduous and you may dodge bullets like plane crashes, space suit punctures, hunting accidents, falls into a canyon, etc., only for so long and one of those non-life kind of accidents will get you sooner or later, probably a lot sooner.
Hi, this is the first time that i have entered the science forum and do so with some intrepidation , for I am not a scientist, anyhow, i will try to be as lucid and succinct as possible. My question concerns the ageing process, we know that cells are able to regenerate and replenish themselves, thus when we accidentally cut our finger, the body func ...[text shortened]... es, is there any reason why this process could not go on perpetually - thanks in advance Robbie.
Originally posted by sonhouseActually Sonhouse my friend, i am just interested, because from what i can understand, we use an incredibly small percentage of our minds potential during a lifetime, way too small!
One theory has it we would not survive more than a few thousand years even if immortality was given to all humans. The idea there is life is too arduous and you may dodge bullets like plane crashes, space suit punctures, hunting accidents, falls into a canyon, etc., only for so long and one of those non-life kind of accidents will get you sooner or later, p ...[text shortened]... er he is clearly in it for the dough, and I don't mean the kind you kneed, the kind he NEEDS
Originally posted by leovIt´s a little difficult to get across how small these effects are. In any case it doesn´t do you any good. What counts for any observer is the flow of proper time. You can sit near the event horizon of a black hole and a trillion years will go by for everyone else, while you will still be alive. The problem is that for you only the seventy odd years that the human body lasts for will have gone by.
--> The closer you are to a gravitational source, the faster you age… Or in space you’d age slower.
--> Speed, in which time is also a factor, also decelerates aging.
Originally posted by AThousandYoungHe has a cold personality.
A friend of mine dedicated his life to curing aging. He finds the US laws annoyingly restrictive. They won't let him progress fast enough to make himself immortal because they demand extensive tests. Last I heard he went into cryogenics so that later they might be able to make him immortal...
Originally posted by robbie carrobieWell then, it would seem you should be interested in research that actualizes a larger portion of our brains during our limited lifetimes rather than wait around for immortality or extreme long life.
Actually Sonhouse my friend, i am just interested, because from what i can understand, we use an incredibly small percentage of our minds potential during a lifetime, way too small!