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After fertilization, how does a zygote get energy?

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After fertilization, how does a zygote get energy?

Postby axiom » Tue Mar 29, 2005 3:28 am

So, after the little sperm meets the little egg, and fertilization happens, where does the energy come from for the Zygote to undergo its intense mytosis? The zygote is, essentially, it's own entity until it connects to the uterin wall, and it's outside the bloodstream...so how exactly does this work?
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Postby biostudent84 » Tue Mar 29, 2005 4:25 am

It only takes about three to four days for the blastocyst (post-zygote stage) to attach itself to the uterin wall. Until then, most of the energy comes from the sperm, which is almost completely made up of carbohydrates.

Remember that during this initial division state, the cells only divide...they really don't start growing until the placenta is formed.
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Postby MrMistery » Tue Mar 29, 2005 7:07 pm

What kyle said goes for humans. Do you need info only on that or in the living world in general?
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
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Postby Linaeus » Fri Apr 08, 2005 9:45 pm

What about the egg.. Doesn't the egg give any energy too? the sperm cell can't just do it all by hisself can it?
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Postby biostudent84 » Fri Apr 08, 2005 9:54 pm

Eggs are formed at the birth of the mother. And since it is propelled though the female's reproductive tract, it doesn't need very much energy other than to exist. It doesn't move, it doesn't do much of anything, so it doesn't have need to produce energy.
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Postby mith » Sat Apr 09, 2005 1:12 am

Contrast this to chicken eggs which receive no nutrition from the mother and are therefore packaged with much nutrition for the baby.
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Postby abharris24 » Mon Apr 11, 2005 10:46 pm

Actually the blatocyst does not attach for 9-10 days--soon after the placenta is formed to give nutrients--before this the embryo is sustained with estrogen and progesterone--
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Postby biostudent84 » Mon Apr 11, 2005 11:20 pm

What is your source, abharris? Mine said 3-4 days.

Also, I do find it difficult to understand how messenger chemicals and metabolism regulating chemicals...hormones...are able to supply energy.

Last I checked, Adrenaline makes your body create energy more quickly...not give it to you directly.
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Postby bellyjelly » Tue Jul 12, 2011 7:52 am

During a normal, healthy pregnancy the newly formed zygote that exists after fertilization lodges itself into the wall of the uterus. The woman's uterus begins immediately to supply the zygote with blood. This is what gives the zygote energy to begin dividing itself via the process of mitosis. The original cell that was created from fertilization will divide to create two cells, which will then divide to create four cells, and so on for months. At the end of the process a newborn baby will be birthed by the mother, comprised of millions of cells that all sprung forth from the simple zygote that was created during fertilization.

Read more: Where Does Fertilization Take Place? | eHow.com http://www.ehow.com/how-does_4586310_do ... z1RsLXJowG
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