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Postby victor » Sat Jul 02, 2005 1:42 pm

But the fact talks different.... :P :lol: :P :lol: Mysterious isn't it??? :lol: :P
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Postby MrMistery » Sat Jul 02, 2005 4:53 pm

If humans could recicle urea into aminoacids, what would be the point of eliminating it? wouldn't it be better if the body used it? But it can't, so it gets rid of it
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Postby victor » Mon Jul 04, 2005 7:24 am

It's just like you said in ATP and GTP difference which GTP is used to form amino-acids but if the amino-acids is enough, the rest of GTP will be converted into ATP.
The same thing might happen to urine that someone drink..if the body need it, it'll turn the urine into amino-acids but if it doesn't need it...the urine will be excreted again...
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Postby MrMistery » Mon Jul 04, 2005 8:03 pm

i doubt it. our organism does everything to convert all energy and not lose a single drop. if it could i doubt our body would throw away such an energy source
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Postby victor » Tue Jul 05, 2005 12:01 pm

Well it can actually since if we keep our urine too long, amonia will be too poisonous for us..so we have to throw it..but who knows that if we 'recycle' it again, it would be useful for our body.
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Postby biostudent84 » Tue Jul 05, 2005 3:08 pm

MrMistery wrote:i doubt it. our organism does everything to convert all energy and not lose a single drop. if it could i doubt our body would throw away such an energy source


Rather, it does everything it CAN do to convert all energy. Our digestive system is extremely inefficient. Humans eat around 20 pounds (9.1 kilos) of food a week, yet they do not gain that much in the same amount of time.
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Postby MrMistery » Tue Jul 05, 2005 9:04 pm

Of course... The main thing is that we can nod digest celulose. Actually you puty on about 10% of the amount you eat
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Postby victor » Wed Jul 06, 2005 11:49 am

My bio book sez: "amonia is a substance produced from protein deamination. Example: one protein have a deamination will produces amonia and ketoglutaric acid. then this amonia will be used to produce other non-essential amino-acids (if the body need it) and produces wastes (amonia or urea through ornitin circle) if the body excess of amonia..
@Kyle
I know that our body isn't that efficient (our heart's efficiency only about 20%).. :wink:
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Postby MrMistery » Wed Jul 06, 2005 5:20 pm

Ammonia is a toxic substance. It is always in excess. The body needs something like 2-3% of the ammonia it produces
Also, IMMSMR urea can not be reconverted into ammonia
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Postby victor » Thu Jul 07, 2005 5:25 am

Why? is it because the bonds between CO and NH3 to form CO(NH2)2 are that strong till oxygen can't oxydate it? :lol: (it's getting more difficult..)
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Postby victor » Fri Jul 08, 2005 8:45 am

MrMistery wrote:Of course... The main thing is that we can nod digest celulose. Actually you puty on about 10% of the amount you eat


How about cooked cellulose?does cellulose break down because of heat? (cellulose give a strong epidermis of plant but if we cooked it, some of them can be hydrolysed with water and the hydrolysing goes faster because of hot boiled water..(if they take heat, they'll go to endoterm reaction).
It means we can eat that..because it's already hydrolysed some to glucose.. :lol:
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Postby mith » Fri Jul 08, 2005 1:11 pm

But our stomach isn't exactly boiling is it? Plus, cellulose is very insoluble in water, you'd have to soak it for a couple of days and use strong acid on it. I believe food doesn't stay in your stomach that long.
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