A state in which an organism or a cellular system, as defined by its full set of functionality, ceases to exist (i.e., most of the functions are irreversibly lost).

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38 views

How to bring back to life a dead body? [on hold]

From biological perspective, is it possible to bring back to life a dead body? I need a thoroughgoing answer.
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4answers
2k views

Can nosebleed cause death?

Can Epistaxis or Nosebleed can be a of cause death?
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0answers
17 views

What models are used for the different pathways of apoptosis?

We are trying to find references for experimental models of different pathways of apoptosis (caspase-dependent and -independent intrinsic apoptosis, death receptor type-1 and -2 mediated apoptosis, ...
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2answers
200 views

How long does it take for memory to disperse after death?

1: There seem to be cases where coma patients with a non-active brain (i.e. flat EEG) have regained full consciousness. => Apparently memory and knowledge are stored independent of brain activity. 2: ...
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3answers
61 views

Does DNA influence death (e.g. by cell aging)

I know that we age because of errors in the cell replication process and these errors eventually leads to death. If we exclude environmental factors, are there any other factors that can cause these ...
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0answers
39 views

Lethality of a stab wound to the back

How deadly is a stab in the back? Video games, movies, and other fiction would have us believe that a backstab against a foe with a modestly-sized blade leads to immediate and certain death, having a ...
2
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2answers
928 views

Why is dimethyltryptamine (DMT) being released during death?

I'm not very well informed about all the things related to biology and the current achievements of science in this field so if I'm wrong in anything I say, please let me know. Many times I've come ...
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4answers
15k views

How long human can survive with just drinking water everyday

Can humans live without eating food, just by drinking water? How long can we survive just by drinking water everyday?
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0answers
94 views

What does it mean when it's said so-and-so died a natural death? [closed]

It is oft said that, so-and-so died a natural death. What does it mean? Is it a direct-causeless death? Meaning doesn't natural death have any cause? Or just that it is unknown and hence a natural ...
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4answers
2k views

How long can a naked human survive on Mars?

How long can a naked human survive at the surface of the Mars planet? For instance, let's say a worker's base takes fire while he sleeps, and he has to run to the emergency building 200 meters away ...
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2answers
130 views

Do animals suffer from “Human” mental disorders?

It is tragic, but apparently Killer whales and Dolphins can commit suicide too (e.g. here)... This suggests they can become depressed. I wondered whether they were "clinically" depressed like many ...
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2answers
63 views

Breakdown current for human body

If I am not mistaken, during exposure to electricity sources it is the magnitude of the current and not the voltage that kills the human body. If so, what is the order of magnitude of current that ...
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1answer
82 views

What are the effects of muscle and fat mass on survivability?

If we have humans A, B and C who are different: A is thin (skinny) without significant muscle or fat mass. B is muscular C is fat Which one of them has the best body for survival in accidents like ...
2
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1answer
1k views

Can one die from pain?

Is it possible that a human or any other creature can die from pain? I googled and found different answers. Some articles say Yes while others say No.
3
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1answer
150 views

molecular indicators of apoptosis: clarification needed

I understand that DNA fragmentation is a molecular indicator of apoptosis. What distinguishes this as a hallmark of programmed cell death, versus one of necrosis?
2
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1answer
257 views

Why do humans bury their dead?

As far as we know Ape Men or the Neanderthal Man was the first to bury its dead. My question is why. I don't think they practiced religion or believed in spirits or faith or stuff like that. ...
5
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1answer
322 views

What could account for an apparent loss of mass at death?

An interesting tidbit floating around the internet these days is that Dr. Duncan MacDougall apparently weighed people shortly before and after death, and found an average of a 21 gram discrepancy, to ...
7
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2answers
292 views

In humans what is the last metabolic process to cease after death?

After death which of our body's metabolic processes will continue functioning for the longest?
4
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1answer
273 views

In the vacuum of space would death be instantaneous?

I was arguing with my colleague about this matter (I'm not going to mention which side I fall on). Would death be immediate in the vacuum of space? For example, if I was suddenly teleported into the ...
3
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1answer
569 views

How long can a unicellular organism live without nutrition? What happens after that? Does it depend on the domain?

Say I have three unicellular organisms: a eukariote, a bacterium and an archaeon. If I cut off nutrition from them at the same time, how long will it take for them to die? What will their death look ...