Search found 62 matches
- Sat Feb 02, 2008 12:58 am
- Forum: Zoology Discussion
- Topic: 6,700 mi/hr
- Replies: 16
- Views: 8807
- Sat Feb 02, 2008 12:42 am
- Forum: Physiology
- Topic: negative/positive feedback loops
- Replies: 12
- Views: 100307
Re: negative/positive feedback loops
Nearly every system in the body is a negative feedback loop; there are very few positive feedback loops in the body, and one example of positive feedback is childbirth.
- Fri Jan 25, 2008 5:42 pm
- Forum: Genetics
- Topic: glow in the dark cats
- Replies: 2
- Views: 2074
- Fri Jan 25, 2008 5:36 pm
- Forum: Human Biology
- Topic: muscles, how do they work?
- Replies: 4
- Views: 3023
- Fri Jan 25, 2008 4:32 am
- Forum: General Discussion
- Topic: Biology, 7th edition, 2005 , Campbell and Reece
- Replies: 8
- Views: 22306
- Wed Dec 12, 2007 6:48 am
- Forum: Human Biology
- Topic: drink type 1 diabetic's blood
- Replies: 9
- Views: 7934
- Sun Nov 11, 2007 8:36 am
- Forum: Genetics
- Topic: Colchicine
- Replies: 8
- Views: 16616
There are other microtubule depolymerizing drugs similar to colchicine, like nocodazole and colcemid , that bind free tubulin in a cell and prevent them from adding onto microtubules. I also know of a drug called Brefeldin that interferes with anterograde transport from the endoplasmic reticulum to ...
- Tue Oct 30, 2007 7:07 am
- Forum: Botany Discussion
- Topic: Electrons in photosystem II
- Replies: 6
- Views: 16844
First off, you have the order mixed up a little. It's the opposite of how they're numbered; electrons move from PSII to PSI, not the other way around. Counterintuitive, I know. Anyway, these electrons come from water. At PSII, a molecule of water is split; one oxygen, two hydrogens; one electron is ...
- Tue Oct 30, 2007 6:54 am
- Forum: Zoology Discussion
- Topic: Need help identifying the following animals
- Replies: 14
- Views: 15412
- Mon Oct 29, 2007 9:54 pm
- Forum: Zoology Discussion
- Topic: Need help identifying the following animals
- Replies: 14
- Views: 15412
Re: Need help identifying the following animals
2. You would have to go to Asia to see one of these but chances are you don't really want to, at least not out in the wild. It's the biggest of its of kind. If you survive the bite the infection will probably do you in anyway. This one has to be the komodo dragon. 4. Not many species belong to this...
- Thu Oct 25, 2007 4:47 am
- Forum: Genetics
- Topic: barr body and colorblindess
- Replies: 3
- Views: 3880
If there are two or more X chromosomes, one of them will be inactivated and will be seen as a Barr body... a normal male should have genotype XY, therefore, NO barr bodies. An abnormal male with Klinefelter's syndrome will have genotype XXY, accounting for the presence of a barr body. If the son is ...
- Mon Oct 22, 2007 5:26 am
- Forum: Cell Biology
- Topic: magnification electron microscope
- Replies: 2
- Views: 2677
According to wikipedia, the magnifying power of a TEM is about 50 million times.
http://en.wikipedia.org/wiki/Electron_microscope
At these magnifications however, I think the more important information to know about electron microscopes is resolution... you can read more about the resolution of EMs here:
http://www.ncbi.nlm.nih.gov/books/bv.fc ... .1715#1749
http://en.wikipedia.org/wiki/Electron_microscope
At these magnifications however, I think the more important information to know about electron microscopes is resolution... you can read more about the resolution of EMs here:
http://www.ncbi.nlm.nih.gov/books/bv.fc ... .1715#1749