Can anyone tell me if the shell of the GTP egg is a living organism? Or another way to put it: does the shell contain living cells?
Thank you,
Rolo
Thank you,
Rolo
                        
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The Egg
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 Frols |
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Posts: 251 (06/19/08 07:43:30)
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Keith Thompson |
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Posts: 315 (06/19/08 10:08:48)
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Rolo:
My understanding is that an egg shell is not a living organism or individual form of life. It contains no organs or other parts that work together to carry on the processes of life. The shell, as I understand it, is a calcium deposit. It is not a seal in that it allows the organism inside to exchange gases and water. Plants and animals have cells, shells are made up of minerals. Some here have strong science backgrounds and should be able to answer your question better. |
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RCulver |
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Posts: 1381 (06/19/08 10:51:21)
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I would address this question as "no" the egg shell (itself) is not a living organism, but the membrane "lining" is indeed comprised of
living "cells".
Richy |
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Frols |
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Posts: 255 (06/19/08 11:12:55)
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Richy...if the membrane is part of the shell, then how about we include the membrane when we consider the question.
Rolo |
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geckos70 |
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Posts: 1114 (06/19/08 11:27:19)
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Rolo,
An egg is synonymous with a single cell. Researchers use Xenopus (genus of African clawed frogs) oocytes (fancy word for egg) as a model organism that is easily manipulated for genetic, epigenetic, protein and ion channel research. This definition carries all the way to the ostrich egg, which is one of the largest single cells known. The membrane the surrounds the Xenopus oocyte is a selectively permeable gelatinous membrane, which is not living tissue. Higher orders of animals have developed mineralized eggs to cope with the environment (selective pressure), because they offer greater regulation of the selectively permeable membrane based on ionic charges from the minerals that compose the shell. the best lines of evidence are looking at images generated from electron microscopy interior side of an egg shows Fiberous architecture 
www.newcastle.edu.au/ a pore in the egg shell notice that there are not any cell like structures based on lack of cell membrane, nucleus, or organelles science.exeter.edu/ exterior of egg again note there are not cells present 
iaq.dk/image/eggshell.htm Structure of the egg shell 
The gross structure of the eggshell has been known for more than a century. The Dutch scientist von Nathusius published analyses of the shells of various birds in 1881 and 1882 (see Romanoff and Romanoff, 1949) and they show much the same picture as publications from the 20th century (Figures 1 and 2).http://www.scielo.br/scielo.php?pid=S1516-635X2005000200001&script=sci_arttext The egg shell is not living but a protective layer of a living cell. It is composed of roughly 97% calcium carbonate. Hope this helps Michael
Last Edited By: geckos70
06/19/08 12:02:11.
Edited 3 times.
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RCulver |
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Posts: 1382 (06/19/08 11:43:27)
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Hey Rolo--
Can you find your answer? Lmfao... Richy |
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Maelstrom |
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Posts: 118 (06/19/08 12:30:02)
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Holy...
Biologist? |
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Frols |
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Posts: 256 (06/19/08 12:30:05)
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Thanks Michael!
That helps me to understand it more. Then it would be correct for me to say that if we do not involve a selectively permeable membrane, then there is no osmosis taking place? Can you tell me if there is any passive tranport occuring with a GTP egg; and if so, how is that occuring? Thanks, Rolo
Last Edited By: Frols
06/19/08 12:44:26.
Edited 2 times.
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Colorado Riverboy |
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Posts: 632 (06/19/08 12:31:00)
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you rock Michael!
Jason Stevens
www.coloradochondros.com |
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geckos70 |
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Posts: 1115 (06/19/08 12:45:11)
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Rolo, Active transport is movement across a membrane, which requires energy usually in the form of ATP. These processes take place in the human cell through membrane proteins via chemical and physical interactions. This is not possible in a chondro egg or a chicken egg because they lack the membrane proteins. Egg shells usually function via passive transport from osmosis and diffusion. This is my understanding of the process. Michael |
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Frols |
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Posts: 257 (06/19/08 13:13:37)
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Yes, sorry...I corrected that with passive transport
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Morelia Viridis |
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Posts: 440 (06/19/08 13:27:41)
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Cool thread!
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Frols |
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Posts: 258 (06/19/08 13:29:28)
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I see. I thought that osmosis can only happen through a selectively permeable membrane, and that a membrane of this type was a living organism.
Ok...I understand my misconception. Thank you, Rolo |
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Jeff Godbold |
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Posts: 434 (06/19/08 14:52:49)
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Michael,
I could be wrong, but I bet you don't get very many opportunities to unload such a specified amount of information, LOL... Having said that, your original post struck me as very interesting and I agree. I took some upper level biology classes due to a different venture of study at one point, and thought I'd never hear about osmosis, passive transport, and diffustion again...well, you proved me wrong. But this is a great thread! |
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Cathy Maynard |
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Posts: 1716 (06/19/08 15:04:15) |
Saw this and thought, cool, I can contribute... Michael, you hit the info out of the park!!! Excellent and very interesting.
I'll toss this in so that everyone will now have this "useless" piece of information: The largest single cell is an Ostrich egg!!! |
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Mike C.chondroforum |
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Posts: 65 (06/19/08 16:42:18) |
I was going to say what Michael said but I guess he go to it before me:)
Just kidding of course, I have a headache from trying to understand all that smart stuff.
____________________________________________________________
/ Mike C / mclark202@insightbb.com / / _______________________________________________________/ |
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geckos70 |
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Posts: 1116 (06/19/08 18:37:46)
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Cool question! Glad I was able to shed some light on the subject. Michael |
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Keith Thompson |
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Posts: 316 (06/19/08 22:01:56)
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Well - so much for Rolos scheme to advertise screaming white live leucisitic baby chondro eggs on Kingsnake.
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