The Egg and the Adult

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Dustfinger
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The Egg and the Adult

Post by Dustfinger » Fri Aug 11, 2006 1:20 pm

Hi, I recently wondered whether birds in eggs excrete the same substance (uric acid) like the grown-up birds.
What d´you think ? Coz i heard something about chickens etc. excreting other things ... :?:
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Post by Dustfinger » Fri Aug 11, 2006 3:33 pm

Hey, where are you all ?
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Post by Dustfinger » Sat Aug 12, 2006 9:45 am

Huhu ? Nobody knows the answer huh ?
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URGENT !

Post by Dustfinger » Sat Aug 12, 2006 10:30 am

It´s urgent ! Need the answer still today !
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Post by Dustfinger » Sat Aug 12, 2006 7:40 pm

Why ???
Anyway , found the answer in a book barely an hour ago. I was right, they excrete another substance first and then they switch to uric acid
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Post by kilroykelim » Mon Aug 14, 2006 4:25 pm

i was suggesting that you seek
more knowledge from the internet about this ok?cos ii don think we can tell you the answer right now
nice time peter

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Post by Dustfinger » Mon Aug 14, 2006 4:44 pm

Just read my post above: :wink:

Dustfinger wrote:Anyway , found the answer in a book barely an hour ago. I was right, they excrete another substance first and then they switch to uric acid
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Post by Darby » Mon Aug 14, 2006 5:31 pm

Your book is wrong. The reason terrestrial animals produce uric acid is to prevent toxification in the eggs.

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Post by Dustfinger » Mon Aug 14, 2006 6:07 pm

My book is right, and you´re right. In the first hours they "decide" which substance they excrete.
And i found this page on Sunday:
http://ex-anatomy.org/nitro.html
So i know it´s because of toxification in the eggs , but one of my books also states they produce more ammonia in the first hours .
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Post by Darby » Wed Aug 16, 2006 1:15 am

It isn't so much a decision as a developing metabolic pathway. Ammonia is produced from amino acid degradation - urea (our main waste) and uric acid (found in sealed-egg terrestrial animals) have to be produced from the ammonia.

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