2006-06-20 06:37:52 · 24 answers · asked by Hibernating Ladybird 4 in Science & Mathematics ➔ Medicine
Hello Summerspirit,
Thanks for your question. I think this question deserved a better reponse than what it has received till now. Anyways, I'll try to compensate:
First of all, neurons don't usually die at all. The neurons are the cells with the least regenerative powers in our body. Once killed, they cannot be replaced! But, as we grow older, some wear and tear is unavoidable and brain cells too are no exception to the wear and tear of ageing.
Still, the brain cells are the last to die in our bodies as they are kept well oxygenated by an abundant blood supply.
Now, the neuroglia cells that support the neurons are not as sustainable as the neurons and thus, are subject to regular wear and tear. So, there must be a path for them and other metabolic wastes to leave the brain, right?
Our brain as opposed to popular conception is not a lump of matter floating in blood. It is floating alright but, not directly in blood. The brain floats in a colorless, transparent, plasma-like fluid called Cerebro-Spinal Fluid or CSF. The fluid provides a one way traffic from the cavities and membranes of the brain to the vein carrying used blood.
So, the CSF takes the dead brain-cells and flows towards a blood stream, then the waste matter is transferred to the blood.
The blood then takes the stuff to the kidneys which is known as the sieve of the human body. Kidney filters the metabolic waste from the blood to urine from where it is passed from the body.
Hope it helped to keep your summer spirit alive! Bye!
2006-06-20 09:19:54 · answer #1 · answered by Abhyudaya 6 · 6⤊ 0⤋
brain cells do not really exit the body, but when they die the stay intact with the brain. If they would though, i would think through the blood stream.
2006-06-20 06:40:45 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Through the blood. I would assume they are the easiest of cells to exit the body because a lot of blood pumps there.
:D
2006-06-20 06:41:39 · answer #3 · answered by Shalltell 3 · 0⤊ 0⤋
They are stuck in your head until you use up the last brain cell. Quit smoking that weed and sniffing that coke. It'll help you save a brain cell or two.
2006-06-20 06:59:20 · answer #4 · answered by Marcio 2 · 0⤊ 0⤋
They don't exit the body. American scientists grow brain cells taken from cadavers, in an advance they say could one day treat neurodegenerative diseases. ... American scientists have grown brain cells harvested from dead bodies ...
2006-06-20 09:28:58 · answer #5 · answered by # one 6 · 0⤊ 0⤋
Specifically, glial cell sensing free ATP will phagocytose dying neuron , and start apoptosis pathways, the proteins are then reused. As bad luck would have it, recent studies indicate that cytokine signalling in aging brain becomes inaccurate, and the glial cells attack healthy neurons also...absorption is in CSF and in cerebro-interstitial fluid.
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2006-06-20 17:58:03 · answer #6 · answered by hallitubevolunteer1 3 · 0⤊ 0⤋
They are destroyed by a method called Wallerian degeneration if cut or crushed. The axons and surrounding myelin sheath are digested by macrophages and Schwann cells.
2006-06-20 06:43:54 · answer #7 · answered by jml3148 4 · 0⤊ 0⤋
Probably the white blood cells (lymphocytes) get them and then they drain out though the lymphatic system. It makes like 2 pints of lymph fluid every day.
2006-06-20 06:40:19 · answer #8 · answered by kurticus1024 7 · 0⤊ 0⤋
through your nasal passages. Dead brain cells are boogers that exit through your nasal cavity...
2006-06-23 14:52:21 · answer #9 · answered by im right 3 · 0⤊ 0⤋
Through the blood stream. Best wishes
2006-06-20 06:39:29 · answer #10 · answered by colorist 6 · 0⤊ 0⤋