Debate and discussion of any biological questions not pertaining to a particular topic.
If you're looking to insert teleological reasons into biological contexts, try this one on for size:
As we age, the average number of mutations in each dividing cell of our bodies increases. As our cells become more mutated, our chance of getting a cancer increases. If a man were to keep living beyond, say, one hundred and fifty years, he would be little more than a walking gumbo of tumors, a twisted human form hideously disfigured by cancer upon cancer upon cancer. Genetic programs which age us and eventually lead to our deaths (through organ failure) spare us from this horrible fate.
(Of course, this is all complete nonsense. The teleological fallacy, etc, and the biological reasoning isn't sound either, since genetically programmed aging of glands - such as the mammary gland and prostate - may contribute directly to cancer. It's still a nice Halloween story for grade schooler bio students, though.)
Vi veri veniversum vivus vici
Apoptosis is the programmed death of a CELL not the organism. It can happen anytime. And another thing is, people die from cancer and ,you know, cancer cells don't go through apoptosis.
The answer of the reason of death can be DNA. because you are programmed to live that long. Telomere can be an answer.
It matters not how strait the gate
How charged with punishment the scroll
I am the Master of my fate
I am the Captain of my soul.
Not Apoptosis only
Apptss is part of process of death.
Natural Death(accidental death is ultimately leads Natural Dth) Starts lot before the day of daeth.
Its In Your DNA.
Earth : Mother Of Life
SACHIN V C
I just read a book about "Aging, Dying, and Death" It is stated that the death is started when brain cells are undergoing irreversible damaged. This can be caused by trauma e.g. from accidents or because lack of oxygen supply because of the weaken body system (blood circulatory system).
There are some cases that individuals still alive or back alive after heart resurcitation. This is because the damaged area of the brain is still little and the oxygen supply is still adequate.
In a special case, an individual is kept alive by life-supporting equipments. When those equipments are removed, the individual will be pass away. The possibility that the individual will come back alive (biologically alive) is very little. If it can be, usually the individual will live abnormal because of the brain damaged.
That's a little too simple. There isn't enough evidence yet to say that telomere attrition is a major cause of organismal death, or even cell death. Certainly, there is a correlation between telomere length and cell age in some animals, but that doesn't imply a causal link between them. Shortened telomeres can lead to the recognition of DNA double-strand breaks, which - in some circumstances - activates the pro-apoptotic machinery. However, in many other cases it activates the pro-senescence machinery, which keeps the cell alive, albeit in an altered, senescent state. How often the cell apoptoses vs senesces depends on the cell type and tissue microenvironment, and it is unclear what effect these per-cell decisions have on the organism as a whole. So it is a stretch to say that our telomeres constitute a genetic program for our deaths.
What's more, telomere attrition and the subsequent expression of senescence genes may actually give an edge to pro-survival factors! There is an idea floating around that when glandular cells (mammary gland, prostate gland) enter senescence, they begin to secrete hormones and growth factors inappropriately. These pro-survival, pro-growth factors swim around in the extracellular environment, causing other non-senescent cells to become tumorigenic. This is one explanation for why tissue age seems to be a more potent factor in the development of glandular cancers (breast cancer, prostate cancer) than other cancers.
Vi veri veniversum vivus vici
I think to answer "why do we die?" we need to answer first "why do we live?"
Evolution has to worry only about life span that is enof to give offspring.
If the life span has been adjusted correctly, selfish gene will throw its shell, i.e. your body, by just not-repairing damages, giving entropy to terminate you.
Damn, I forgot. I will write it when i got the book back
Who is online
Users browsing this forum: No registered users and 8 guests