Reputation
5,317
Top tag
Next privilege 10,000 Rep.
Access moderator tools
Badges
1 12 40
Newest
 Yearling
Impact
~422k people reached

Apr
7
answered What's the Evolutionary Purpose of Religion?
Apr
5
reviewed No Action Needed How can I resuspend a cell pellet without harming the bacteria?
Apr
5
comment What are the biological mechanisms behind the increase in cancer risk and alcohol consumption?
Our pharmacology course taught alcohol essentially as "is an extremely unspecific molecule and doesn't really bind to anything, but we take it in doses high enough to drive random reactions everywhere" (its effects start at mM concentrations, 1000x higher than drugs tend to). It's tiny so I don't see a barrier preventing entry into the nucleus and randomly reacting with DNA.
Apr
5
awarded  Custodian
Apr
5
reviewed No Action Needed How to Design an siRNA Experiment?
Apr
5
comment How do axon terminals report to the soma?
As far as my teaching has gone, glia provide scaffolding and in some cases are involved in metabolising small molecules, but not in any way proteins. And if they do, that just makes the question even more interesting - how would the axon terminal feed back to another cell when it needs more or less of a protein?
Apr
4
asked How do axon terminals report to the soma?
Apr
4
comment What is range of the number of individual organelles in cells
Yes @terdon definitely has a point. In fact, organelle concentration is very different even in different parts of a single cell. E.g. the axon terminals of neurons contain a lof ot mitochondria to provide ATP for continuous firing, while the cell soma (the main body, which can be more than 1m away) contains much fewer of them. Another case, most cells only have one nucleus. Certain cell types like skeletal and cardiac muscle or the placental trophoblasts however fuse and form multinucleated cells.
Apr
3
comment Why Do Nerve Signals Get Crossed?
How clear is that sensation? Does it correspond to your finger movement, i.e. are you certain that it is a misprojection of the sensation (onto the wrong part of your body)? With such a rare occurrence it could just be a random error.
Apr
3
comment Why Do Nerve Signals Get Crossed?
What I meant was things like, if it was mislocated on the same spot but opposite side of the body for example; but it seems to be random. The other question was what exactly causes it to happen - does it only occur when you are scratching yourself after you were itching or also in other situations?
Apr
3
comment Why Do Nerve Signals Get Crossed?
Could you clarify exactly how the sensation is wrong for you? You are supposed to have an itch for whatever reason, and when you scratch it it's supposed to go away and you get the touch sensation of your fingers instead. All in the same place of course. Are you saying that the actual touch sensation of your fingers on your skin is mislocated? If so, is there a regularity to where it is mislocated (e.g. symmetrical to body axis)? And does this only occur on skin that was itching before, or any part at any time?
Apr
3
answered Why does contracting the iris allow less intense light to go in?
Apr
1
revised Is it technically possible to make someone see something when their eyes are closed?
deleted 3 characters in body
Apr
1
answered Is it technically possible to make someone see something when their eyes are closed?
Mar
31
revised If life is discovered on another planet, will it likely be classified using the current domain/kingdom/phylum system?
added 640 characters in body
Mar
30
comment If life is discovered on another planet, will it likely be classified using the current domain/kingdom/phylum system?
Valid point, does that sound better? I have to say that this made me realise the question could stir discussion more than encouraging an objective answer, so may be a candidate for closing.
Mar
30
revised If life is discovered on another planet, will it likely be classified using the current domain/kingdom/phylum system?
what's up with my o's and u's tonight
Mar
29
comment DNA gel extraction: chemical contaminants
Agree, you should check the reading before digestion and see what amount of DNA you're working with.
Mar
29
answered If life is discovered on another planet, will it likely be classified using the current domain/kingdom/phylum system?
Mar
29
reviewed Close RACE pcr product