Biology

The biosphere is dominated by dark, largely “arrhythmic” habitats, and most of life lives away from the direct effects of the sun...studies of species that live away from the sun are a very small fraction of chronobiological research. Perhaps unsurprisingly, when I have then looked at some studies on long lived species in such environments, I have found that a number have hard to quantify circadian rhythms. The long lived eusocial naked mole rats shows attenuated or no circadian clock rhythms, and although circadian rhythms have been described in the nematode Caenorhabditis elegans at the behavioral level, these rhythms appear to be relatively non-robust. As is w…

Are Whitetail does with antlers, shunned by the rest of the herd? I'm asking because yesterday, I saw an 8 point Whitetail all by itself. Twice. This time of year in my area, the bucks should all still be together, or chasing does

So in my lecture we blew past energy systems today and its been a while since I studied them and to be quite frank it was anatomy and physiology so the concepts of each energy system were as deep as we got. We studied net gain and stuff like that but never detail. I am just slightly confused in the aspect of the energy systems when H+ gradient is created and protein synthase helps in the production of ATP molecules though the electro-chemical gradient. I am wondering how does the cell pump H+ ions though using NADH. Is there any good videos or maybe someone on here could point me in the direction of a good place. Thanks

Do you think we can potentially rewind the neurons in your brain to earlier stages, basically replaying someone's life experiences? I feel like it's difficult to accomplish, but would offer many new possibilities

Cro magnons are something the 'science' world doesn't talk about very much for some reason. But we talk about neanderthals and and early hominids all day long. Apart from the strange fact that 'Cro magnons' had significantly larger brains that we do...I've noticed something that I've never had an answer for that maybe someone here can answer... *WHY is there a perfect circular indention on the forehead of almost every 'Cro magnon' skull that has been found?? I can't seem to find a logical explanation. Here are two examples... Here's another example. And a view from the side.

There is a person that has been around for a while known as the 'The Dutch Ice man'. Here is a documentary on him, (there are several.) His name is Wim Hoff, and he is known for being able to submerge himself in dangerously super cold temperatures for a long time, and through breathing exercises/meditation he has scientifically proven in lab experiments that he is able to resist infections/sickness and boost his adrenaline to very high levels AT WILL. He's not the only one that can do it though because he did the same experiments with his students. Of course the traditional understanding of the autonomic nervous system is that it is an unconscious system, …

hello everyone,i would like to know please if it's possible to sterilize a liquid with only UV radiation bulb lamp (i have a nacl 0,9 serum which are completely transparent liquid that i want to expose to a 11w uvc lamp ). thank you !!

Studying the nervous system and I was wondering why are motor neurones, sensory neurones and relay neurones all different? In what way are multipolar neurones, as in motor neurones, more effective at sending signals to muscles than unipolar neurones, as in sensory neurones? And why the cell bodies of motor neurones larger than that of sensory neurones Why don't relay neurones have myelin sheaths? My questions can be summed up as: how are the neurones adapted for their function?

When humans or animals die, do their atoms live on forever or do they eventually decay?

Do animals ever have nocturnal emissions/wet dreams?

I understand some people have their genome fully sequenced, but that doesn't mean we understand what the genome does. So when is it that we will finally be able to know that a particular sequence represents height or something else having the genome fully decoded?

So after watching this video, I'm not quite sure how specific microRNA is produced for the cell type. It's like skin cell only produce skin cell regulatory microRNA and muscle cell only produce muscle cell regulatory microRNA, but what causes the RNA Polymerase 2 to select and produce the microRNA needed for the cell type? P.S. We're getting real close guys

Hi guys I'm a medical student and have some cardio physiology questions that I'm currently trying to figure out. I wanted to see if anyone here has any good ideas. These are challenge questions which my physiology professor has posed to us. My friends and I already have some ideas but I'd like to hear what other people have to say. 1.- What is the mechanism responsible for large artery pressure being higher than that in the aorta? 2.- What is the mechanism for flow to move from the aorta to large arteries 3.What causes resistance to increase in a passive bed when blood pressure is decreased? 4.What would resistance be when blood pressure increases in a…

So I was reading how specialized cell is reverted to stem cell with transcription factors, which are proteins. What I want to know is essentially how it "controlling the rate of transcription of genetic information from DNA to messenger RNA" as Wikipedia says. If someone can provide me some insight of this it would be cool, especially what it means by "rate of transcription". How does it differ from what microRNA does?

Anyone got any idea what the hell this thing is!?

Can someone explain how RNA silencing helps drug design?

I know DNA make protein, but what does this protein do? I heard it turns into white blood cell, does it also turn into enzyme?

My name is Ben and I am a high school student. I am currently conducting a research on the efficacy of 3 different types of hand sanitisers on bacteria (Bacillus subtilis). I would like to ask this question: Is it safe to culture and grow samples of bacteria directly from our hands? This is one of the issues that has deterred me from continuing my research as my teacher is not sure whether it is safe and I was hoping that you would be able to clarify things a bit! Thank you Best Regards, Ben

What's your opinion on this? And why do you feel that way? Provide facts if you can

I'm doing this not because the school said, but because I want to get good grades in my GCSE's so please don't say "do it yourself" because I DID try, I even used the answer sheet but I still do not understand. Could anyone help me with this question? https://gyazo.com/35c495b42eea7b952acb56997df92fa0

On earth, fish may behave as there is no gravity, hovering in midwater without sinking. But they stay belly down (because of their bladder?) Would they orient themselves randomly in microgravity ? This picture is not fully showing if yes or not : ----> http://1.bp.blogspot.com/-O3apFdAqUoA/U44CEJ_4IUI/AAAAAAAAb8I/CaCEIntjiDI/s1600/4_20121107.wmv_snapshot_00.30_.2014.05.14_14.35.27..jpg

so if 65% of the human body is made of oxygen (according to wiki), does this mean that if humans die, oxygen is dispersed in the air and we all breath dead people?

How do cells repair themselves

I was wondering, are they?

I am not a biologist and looking to find some sort of description of an answer to the question above, if we have one at all.