Reputation
5,071
Top tag
Next privilege 10,000 Rep.
Access moderator tools
Badges
1 10 38
Newest
 Nice Answer
Impact
~285k people reached

Jul
24
comment Could we transmit smells electronically?
I guess ultimately you could say the reason is the nature of the sense you're trying to reproduce. While seeing, hearing and touch are all senses based on non-material physical phenomena (sound waves, light rays, forces), the sense of smell serves as a tool to sample gaseous chemicals. This is why it's so intimately connected to taste, which is sampling the chemicals in solid and liquid matter.
Apr
7
comment Why do some people find vegetables so repellent when evolutionarily they should find them an attractive and thus tasty food?
Though in retrospect, I'm not sure anything about attractiveness, i.e. sexual selection, is very relevant to evolution of taste - at the very least considering that overcoming our sense of taste is a pretty easy thing to do in order to increase attractiveness (which is very evident today).
Apr
7
comment Why do some people find vegetables so repellent when evolutionarily they should find them an attractive and thus tasty food?
I must humbly apologise for this most intolerable shortcoming of mine, I shall endeavour to re-read every word I write on the internet at least every six months! [I actually did re-read the whole thread earlier, but failed to make the connection] On topic, I would expect overweight to be indeed related to micronutrient deficiencies - in that overconsumption of food (particularly the kinds of foods available in such cultures where overweight was considered attractive) would simultaneously at least prevent deficiency.
Apr
7
comment Why do some people find vegetables so repellent when evolutionarily they should find them an attractive and thus tasty food?
@octern Thanks for your comment! Could you clarify how micronutrient deficiencies relate to the question, answer or my comment earlier?
Mar
20
comment Are there sterilisation methods that do not denature proteins as heat does?
I'd recommend removing the claim about human health as it's very questionable. Sterilisation by heat can, depending on the actual temperature, indeed denature proteins. Similarly, strong radiation will ultimately break molecules. I can't tell you whether the levels used to sterilise milk are sufficient to denature anything contained in it though. In general of course, "Are there sterilisation methods that do not denature proteins as heat does?" should be a valid question.
Nov
14
comment What is this bizarre in-growth in this red bell pepper?
Hi there and welcome! The link you provided is very useful, but please expand your contribution into a proper answer to the question, otherwise I would recommend posting this as a comment only :)
Oct
9
comment Are neural connections one-way?
Dendrites don't transduce action potentials. They convert various inputs into membrane potential changes which propagate along them by diffusion towards the cell body. All incoming signals ultimately influence the potential gradient across the membrane of the axon hillock, where an action potential will begin if the depolarisation is large enough. en.wikipedia.org/wiki/Neuron#Anatomy_and_histology
Oct
8
comment What limits our healing speed?
The limiting problem is the formation of new tissue. New cells could indeed be produced faster, but forming tissue requires much more than just cells. It requires extracellular matrix to provide attachment for new cells, collagen and various other intercellular fluid components (which are secreted by fibroblasts), migration of cells. And bear in mind all of this isn't done on an open end, it needs to be done without actually at any point breaking the blood circulation system or other boundaries between tissue compartments.
Oct
8
comment iodine: how did they manage without it in old ages? (People who were living far from the sea)
@ddiez I think iodine is a bit too specific to warrant a tag and thyroid hormones as a tag only indirectly describes this question; I think it's prefectly appropriately tagged
Sep
18
comment Machine learning for light microscopy — problems to solve?
Unfortunately exactly that :/ This question fits several of the "what not to ask" examples in the FAQ. (biology.stackexchange.com/help/dont-ask) You can of course bring these sort of things to chat! (link at the bottom of the page)
Sep
16
comment Why aren't introns found on the ends of pre-RNA?
Neither pre-mRNA or mature mRNA begin with exons, they begin with the 5'UTR. Are you asking why the sequence after the 5'UTR is always an exon? Or are you asking why there can't be introns before the 5'UTR?
Sep
16
comment Manufacturing of Bio Molecules
This is more about chemistry than biology (synthetic chemistry to be exact) and should be moved to Chem.SE in my opinion.
Sep
13
comment Why do I breathe out of BOTH nostrils?
If you're concerned, talk to a doctor - we can't give you medical advice here. Speaking biologically though, as you can read on the page you linked, we don't really know whether the nasal cycle serves any purpose. The only explanation I've heard is to reduce desensitisation of the olfactory sensors from overstimulation (basically giving each side of the nose alternating breaks). Assuming that, the only effect of a genetic variant that doesn't have a nasal cycle would be a weaker sense of smell.
Sep
10
comment Why sleep? No, actually, why wake?
We should be fine using this: chat.stackexchange.com/rooms/1997/biology
Sep
10
comment Why sleep? No, actually, why wake?
Hi and welcome to the Biology part of SE! I think you're tying in a few different concepts here, and they're really more philosophical than biological. I don't think it makes for a good SE question, but feel free to join me in Chat and I can talk you through some of the basics that I'm aware of.
Sep
7
comment Chromatids in metaphase?
I would have guessed it's metaphase of Meiosis II but there should be only 23 chromosomes in that case.
Aug
28
comment Pharmacokinetics: why do certain drugs follow zero-order kinetics?
Hi and welcome to Biology.SE! We encourage making a decent attempt to answer questions before we make new posts - could you let us know some of your thinking that led to this question, and what part of it you couldn't find easily by searching the web?
Aug
24
comment Can genes change as we age?
The contradiction is gone now - it was exactly the part after "I've never heard of any case" that caused that (because you then went on to explain a case that you heard of) :)
Aug
24
comment How much does a typical biologist know about signal processing, machine learning, and (theoretical) computer science?
I think this question could improve if you added the reason why you're asking this (depending on which it may or may not have an actual answer). As it is, you're just requesting comments and the StackExchange Q&A format isn't really useful for that. Feel free to take this to chat of course: chat.stackexchange.com
Aug
24
comment Can genes change as we age?
Where do you get that info about parental transmission of epigenetics in order to speed up /slow down the baby's development? You're contradicting yourself here by saying there's nothing, and then saying what there is. Aside from that, telomerase is active in germ cells and thus the transmitted telomere length will not be affected by parents' age (jcs.biologists.org/content/115/8/1643.full.pdf - it would be a bit weird if it was any other way)