0
votes
1answer
14 views

Can I use grayscale images when working with ImageJ?

I am using ImageJ to analyze Western Blots. I have scanned films in as grayscale images because this is how we did it in my old lab. People in my current lab are not satisfied with that explanation ...
1
vote
0answers
6 views

Evolutionary reasoning behind redundancy of CST and RuST

According to my neuro-anatomy class, both the Corsticospinal Tract (CST) and the Rubrospinal Tract (RuST) control upper limb movement. What the evolutionary reasoning behind this redundancy and the ...
4
votes
4answers
393 views

How can I find a complete human genome file

I'm trying to figure out how I can download a file that represents the complete human DNA sequence. I don't care too much about the format – I'm able to write C++ code to parse it. FASTA seems like a ...
2
votes
0answers
24 views

Which types of blood vessels can regenerate in humans/mammals?

Which types of blood vessels can regenerate in humans/mammals? Specifically: Arteries Arterioles Capillaries Venules Veins Does the capability vary in different organs (e.g. blood vessels in a ...
0
votes
0answers
31 views

5,6-dihydrouracil and 5,6-dihydroxyuracil - how they arise in DNA?

5,6-dihydrouracil can be formed from cytosine after exposure of DNA to ionizing radiation under anoxic conditions [1]. What are other ways by which 5,6-dihydrouracil is formed in DNA? What about ...
3
votes
2answers
34 views

How long does a signal from the brain take to reach the limbs?

If the brain sends a signal to move what's the time it takes the signal to travel via neurons to motor neurons in hands, arms and legs? How fast do those signals travel?
6
votes
1answer
580 views

Does a bigger breast give creamier milk?

It is fairly common for a woman to have one breast larger than the other. I have also heard that, for a breast feeding mother it is common for one of the breasts to yield a creamier milk whilst the ...
1
vote
1answer
34 views

Why do we suddenly forget things, like PIN or phone numbers, that we've known for years?

Is it common to forget a 4 or 5 numeric code which has been used extensively for months and well remembered? There's an article on the guardian describing this phenomenon and by the number of ...
0
votes
0answers
26 views

Random walks in biology [on hold]

Where can I find all classes of random walks? Do you know any book or article which explain how can I distinguish kinds of random walks from each other? I know some differences between supper and sub ...
0
votes
0answers
11 views

Unexpected stoichiometry n in ITC experiments

I'm looking at the binding of a small molecule to several RNA constructs and tried to determine the binding constants. To do this I've performed a few ITC experiments on this system, the results were ...
0
votes
0answers
10 views

pseudocode needed for confocal imaging which can be reconstructed in a 3D format.

In confocal imaging we get many stacks of images which can be reconstructed in a 3D format.but most imaging analysis takes into account a 2D projection of all the frames, which makes our analysis ...
0
votes
2answers
26 views

About animal ecology and one view of this in science fiction

In the movie the Matrix Agent Smith said something like, 'all animals strive to find a natural 'equilibrium' with there environment ,... a harmonious existence with their ecosystem', ( forgive ...
0
votes
0answers
16 views

Why does a pecking order almost always exist in groups of social mammals?

I think the best explanation might come from evolutionary game theory. But, an another viewpoint may be equally important.
1
vote
0answers
11 views

What is the mechanism responsible for the 'delay' in delayed rectifier potassium channels?

I've been trying to find a comprehensive explanation concerning the nature of the 'delay' in neurons' delayed rectifier potassium channels. As it's written in my intro to neuroscience textbook, these ...
15
votes
3answers
3k views

Why don't mammals have more than 4 limbs?

Arthropods have 6 or more limbs and arthropods with 6 limbs appear to move faster than arthropods with 8 limbs so I wonder whether this might have something to do with fast and efficient locomotion. ...
0
votes
2answers
30 views

Can you disconnect sensation from the brain without destroying muscle functions?

I want to know if it would be possible for a surgeon to "shut off" a person's senses without causing paralysis of any kind. The person would have to maintain their ability to speak and move, but not ...
-2
votes
0answers
20 views

What to know if some elements of pig is contained on serious mass by Optimum nutrition [on hold]

Urgently, i want to know if the mass gainer (Serious Mass) by Optimum Nutrition have some composents of Pigs. Please, if someone knows the answer, just tell me!!
5
votes
1answer
51 views

Why do some cuts leave scars, while others do not?

Last year I got a moderately-deep cut on my finger, and it left a scar. Six months later, the scar is still there. On the other hand, I've had lots of other cuts on my fingers, though none have left ...
3
votes
1answer
40 views

What is the difference between osmotic potential and osmotic pressure?

Which term is used to calculate water potential? Does osmotic potential mean the same as solute potential?
0
votes
0answers
15 views

Potassium's Effect on Cardiac Syncytium

I am trying to find databases about the effect of potassium on the architecture of the proteins (syncytium) and excitability of the heart. AAMI-standard database would be great. However, I think the ...
3
votes
3answers
55 views

What bird species is this? (Heron-like waterfowl from China)

I need help identifying this bird. (Some sort of heron?) It was seen in Wuhan, Hubei, China, in September. It is very common there. It can also swim like a duck, but I've only seen it do this once ...
3
votes
1answer
41 views

What is the context in which a species gets the name “elegans”

Quite a lot of Latin binomials from different genera contain the same species name. For example, there are a number of that reflect the physical properties of the species (Tables have the latin name, ...
1
vote
0answers
77 views

Can plants evolve into animals given enough time? [on hold]

A joke is that humans share 40% of our DNA with cabbage. I'm interested if it is possible for what we think of as plants to evolve into something we can classify as animal given enough time (a billion ...
2
votes
1answer
14 views

Are the cpli and ctli tests time senstive(i.e. is it needed to test right away in order to get accurate results)?

I'm sending the blood samples to a lab and this takes some time until the actual testing. Some information on the tests. TLI : ...
2
votes
2answers
28 views

Short, concise, practical manual for doing experimental biology

I am am physical scientist working in biology, and have recently started doing experiments. I would like a manual akin to "Numerical Recipes", but for the lab: straight forward, easy instructions on ...
0
votes
1answer
25 views

Does applying sugar to the tongue taste buds releave sugar withdrawal symptoms?

I found several online articles discussing sugar withdrawal symptoms that people experience after cutting back on large sugar intake. ...
9
votes
2answers
1k views

What percent of your blood can you lose before you need a transfusion

Losing a little blood is okay. If your a normal healthy person, and got into an accident, how do they know if you need a transfusion or if you'll be okay? This is hypothetical.
8
votes
2answers
786 views

What is the evolutionary explanation for bat's echolocation [on hold]

The bat's ability for echolocation is amazing (so are other the abilities of other animals). I was wondering how all of it came to be.
0
votes
1answer
20 views

What is the difference between a fixed substitution and a single nucleotide polymorphism (SNP)?

I recently read a report that stated "We found 430 fixed substitutions […], with an additional 34 single nucleotide polymorphisms (SNPs) fixed within individual patients." What is the difference ...
1
vote
0answers
37 views

Planes of the Body [on hold]

I have a number of Orientation sections in an application that apply to classifying wounds on a human body. I'm looking to add relevant names for each section, but am a little stumped as to what the ...
2
votes
0answers
24 views

Biology Experiment Data (Hodgkin-Huxley)

I'm doing research into the Hodgkin-Huxley Model from an electronics/mathematics perspective and I'm looking to find actual numerical results from experiments on squid axons. I want to compare the ...
3
votes
1answer
22 views

What are typical values for bone mass in humans?

I wonder what are typical bone mass values for adult males and females? And do they change significantly with workout and diet?
-9
votes
0answers
48 views

Regarding Gay Bomb [on hold]

Recently I read a article on Silly Science. There I got to know about this Gay Bomb, it makes the enemy sexually attractive to each other. As it says its a Non Lethal Chemical Weapon, will it be ...
2
votes
0answers
20 views

Regarding the kingdom Animalia, which phylogenic tree is more common: Molecular Comparisons or Body-Plan Grades

In the picture below, which I obviously do not own: it depicts two different phylogenic trees, one which is based on molecular comparisons and another one which is based on body-plan grades. My ...
0
votes
1answer
26 views

Bacterial Cell Problem

A microbiologist has discovered what she thinks are two new types of algae. The first cell (Organism 1) appears cubic and is approximately 1.5 μm long, 1.5 μm wide and 1.5 μm deep. The second ...
1
vote
1answer
26 views

Definitions of robustness and canalization

The concepts of robustness and canalization are fashionable today in the biology literature. However, I am not sure of their definitions and I am not sure either that all authors actually use the same ...
1
vote
2answers
41 views

Is carbohydrate an important part of phospholipid?

My professor tells us that carbohydrate is an important part of phospholipid, but phospholipid is composed of Choline, Phosphate, Glycerol and two Fattyacid, and I don't think even one of them is ...
0
votes
0answers
29 views

Are triglycerides fat?

I have a quick question: Are triglycerides essentially what we call "fats"? I've tried reading up on it but there seems to be some conflicting information. Thank you.
1
vote
1answer
44 views

Is Sugar a stimulatant or a weak sedative?

Quite often, I have heard the remark that children become hyperactive when high amounts of sugar are consumed. But common websites suggest that sugar is a sedative, and the hyperactivity in children ...
0
votes
0answers
57 views

Help planning an experiment with Arabidopsis thaliana [on hold]

I am a PhD student in computer science. I have developed some interest to biology, and I would like to do a first real experiment. I have access to bright-field microscopy (Zeiss Primo Star) and basic ...
11
votes
2answers
115 views

How is menstruation not suicide in the wild?

Watch any wilderness special for more than a few minutes, and you'll notice a familiar pattern: when a predator catches the scent of blood on the wind, the hunt is on. Wounded animals make the best ...
1
vote
1answer
23 views

About excessive cellular growth

When there is 'excessive' cell growth 'ordered' by the human body in some specific part of the body that is not part of the usual repairing mechanisms, does this cause extra telomere 'shortening' or ...
0
votes
1answer
26 views

Why would yeast grow but not produce alcohol?

I'm studying for my intro to microbiology test and I have a question asking why a culture of yeast responsible for producing alcohol would be growing, but not producing alcohol? The multiple choice ...
0
votes
2answers
37 views

How come degraded eyesight still holds with a mirror? [on hold]

When you use a mirror to look at something, you can position it at an angle arbitrary to your face and still look at an object far away. My question is, for degraded eyesight, how come the picture is ...
0
votes
0answers
17 views

Are there any advantages to using a Dpy-10 worm? [on hold]

C. elegans, I mean. Is there any advantage of the Dpy-10 gene or specific function that makes this worm better?
0
votes
0answers
15 views

How loss of heterozygosity influence expression levels of a gene ?

I am looking at a genomic region associated with a vascular diseases; this region have loss of heterozygosity. I am wondering how the expression level of the genes in the regions will be affected ...
2
votes
1answer
46 views

What percentage of DNA do people share?

If you picked two people in the world at random, sequenced each of their entire genome, and compared their DNA, what would the expected percentage match be?
6
votes
1answer
53 views

How does myopia develop, exactly?

Recently I was reading about myopia and I understood a few basic facts about it: Its initial cause is a constant spasm in the ciliary muscle. To do less work, the eyeball elongates a tiny bit. ...
0
votes
0answers
26 views

Does a pregnant female body treat the fetus based on gender?

I have seen on a youtube video that the female body produces antigenes and antibodies when she is pregnant with a boy. But this behaviour is not produced when she is pregnant with a girl. These means ...
1
vote
1answer
22 views

Regarding cancer cells and telomeres

If cancer cells have telomeres are they different than the telomeres in non-cancerous cells? Would cancer cell telomeres be somehow 'set-up' to function almost indefinitely; in other words are 'they' ...

15 30 50 per page