0
votes
0answers
3 views

How is the mechanism works which controles the bloodpressure in the brains?

I've heard that the bloodpressure in the brains is organised by a special mechanismen. What is that and how does it work?
0
votes
0answers
9 views

Can the activity of bacteria be influenced by magnetism?

Some organisms are tuning their direction on a magnetic field. But are bacteria also reacting on magnetic fields and can it be used in health therapie as a kind of 'antibiotic'?
1
vote
1answer
12 views

What is it that specifically kills ALS patients?

ALS is a fatal motor neuron disease, and even though there are many different articles out there on the topic "How does ALS actually kill you?", none of them really delve deep enough into biology to ...
0
votes
0answers
7 views

Is the efferent arteriole a pathway for filtrate through the nephron ?

I am studying the urinary system. I have to identify what part of the nephron is not a pathway for filtrate. I believed the collecting duct is not a pathway for filtrate because once the filtrate ...
2
votes
1answer
14 views

What physical or mental actions can be picked up by EEGs?

There certainly seem to be a lot of gadgets and gizmos leveraging EEG technologies to the control of devices. This makes me wonder: what intentions/thoughts can be captured by EEG technology, and ...
3
votes
1answer
18 views

What is the definition of a mutation?

There are two alleles that determine the sensitivity of a person to Coumadin (a medicine for blood thinners used to treat a stroke etc). Sometimes you encounter the terminology that one has a mutation ...
2
votes
1answer
54 views

Good pipetting technique?

Good pipetting technique is essential for many biologists, but it can be hard to get right. When I take 1 µl of liquid using a micropipette, I seem to always take less than 1 µl, and that amount is ...
2
votes
1answer
36 views

What do proton pump inhibitors do?

I know that sodium azide and 2,4-DNPH inhibit proton pumps. The azide is called an inhibitor and 2,4-DNP is called uncoupler. I want to know what's the difference between the mechanisms of action of ...
1
vote
0answers
15 views

Can the human body switch to a “starvation” mode? [migrated]

I've heard on multiple occasions from less than credible sources that dieting by eating less (usually implemented by skipping meals, not smaller meals) will cause the human body to enter some sort of ...
1
vote
0answers
25 views

Why do denatured proteins tend to be less soluble than the native protein?

Why do denatured proteins tend to be less soluble than the native protein? In terms of hydrophobic effects, could anyone explain this phenomenon for me?
0
votes
0answers
21 views

How and why do skin tags develop?

WebMD writes: Skin tags are small, soft pieces of skin that stick out on a thin stem. They most often appear on the neck, armpits, upper trunk, and body folds. The cause of skin tags is not known. ...
2
votes
0answers
11 views

Do primate RGCs have overlapping receptive fields?

According to this link, http://hubel.med.harvard.edu/book/b10.htm retinal ganglion cells (RGCs) receive input from overlapping receptive fields (RFs). This is also an idea used in convolutional ...
2
votes
0answers
12 views

How would one identify cellular transcription factors associated with a viral protein in a treated cell line?

I've been working as the computer guy for a microbiology lab for the past few months. I've always been interested in bench work, but my wet lab experience is rather limited and thus so is my ...
0
votes
0answers
7 views

What is the function of the Moderator band?

The moderator band in the right ventricle is a band sorts of muscle which consists of a significant branch of the AV bundle. Does it mean it delivers impulses to the anterior papillary muscle faster? ...
0
votes
0answers
7 views

how to see prefrontal cortex works normally by a test?

Is there a test to see if the Prefrontal cortex of someone works normally? especially a simple test like a questionnaire that you give the individuals to fill out and based on their answer you obtain ...
0
votes
0answers
20 views

Sexing fish from a tissue sample

How can you tell the gender of a fish from a tissue or blood sample and what equipment do you need (how much magnification in a microscope)?
0
votes
1answer
39 views

What causes swelling after impact?

Why does the head swell after getting hit by something hard? What is the liquid that forms after impact?
0
votes
0answers
6 views

Energy efficiency of carbohydrate > fat conversion

How efficient is the human body in converting surplus carbohydrate into fat? E.g., if you have 100 calories' worth of carbohydrates at the start of the process, how many calories' worth of fat will ...
1
vote
1answer
24 views

amount of tRNA and its extra arm

How much of the total RNAs is tRNA? Some say 15% and some 20%. Those percentages came from my different teachers. Which is correct? And what are the functions of the extra arm (variable loop) of tRNA? ...
0
votes
0answers
22 views

Lifeforms concentrations of the categories of macromolecules, and Lipids

Lifeforms are formed of large, modular, organic molecules called macromolecules, large organic molecules called Lipids, and simpler molecules such as H2O. Macromolecules are commonly grouped into the ...
1
vote
2answers
25 views

Can DNA be denatured at acidic pH?

Some say that DNA is denatured only at basic pH. And some say at both acidic and basic pH. So I want to know clearly why and how if DNA is also denatured by basic pH.
0
votes
0answers
15 views

dihedral angles [migrated]

My guide asked me to measure the dihedral angles of a poly-peptide chain.There are 4 atoms in between two planer surface(2 atoms in each plane).(refer dihedral angles wikipedia) There is a formula for ...
3
votes
1answer
60 views

Distinguishing Father from Brother

Given the (non-identical) DNA sequences of two men and the knowledge that the second man is either the father, brother, or son of the first man, is the DNA useful in determining which of these three ...
1
vote
1answer
20 views

What separates gene loci?

Introns are sections of noncoding DNA that separate exons within a gene locus. However, between different gene loci, I also would assume there to be noncoding regions of DNA. What are these regions ...
2
votes
2answers
42 views

Crossing over and exon shuffling?

Campbell Biology 10e, in discussing the functions of introns, writes: The presence of introns in a gene may facilitate the evolution of new and potentially beneficial proteins as a result of a ...
2
votes
2answers
1k views

Are these lovebugs?

I used to see these insects frequently in Chennai and Bangalore (South India). I just would like to know if this is a kind of lovebug. The lovebug as mentioned in the Wikipedia page is, however, ...
-1
votes
0answers
17 views

What are the most currently effective ways of delivering material to the body, and housing it in the body?

My question is about the most effective ways that currently exist (or some of them) for both delivering foreign material inside the body, and keeping it safe from the immune system. For an example of ...
0
votes
0answers
11 views

What are some examples of non-amphipathic membrane lipids? [on hold]

Thanks for taking the time to answer my question.
1
vote
1answer
13 views

Anemiaceae etymology

What is the etymology of the name Anemiaceae for a family of ferns? I assume that it's from the name Anemia for one of its genera, but that is equally mysterious. Obviously it has no blood, but what ...
1
vote
0answers
21 views

Hormones of a 5 year old girl [on hold]

What kind of hormonal changes do 5 year old girls experience? Also how can they change the behavior?
1
vote
0answers
15 views

How should one interpret heritability? Is it related to $R^2$?

From Wiki: Heritability estimates are often misinterpreted if it is not understood that they refer to the proportion of variation between individuals on a trait that is due to genetic factors. It ...
0
votes
1answer
21 views

Countercurrent multiplier mechanism

How exactly does the countercurrent multiplier mechanism work in formation of urine in the body? I am unable to find a satisfactory answer to this.
1
vote
0answers
12 views

Wax layer destruction from seed coats

I'm working with some orchid species, and i encounter a specific issue. Some of those species deposits upon their seed coat a wax layer. This layer makes seeds behave in a very hydrophobic way. You ...
16
votes
7answers
4k views

Why can't we see in low light if staring long enough?

For me it seems reasonable that if I kept my gaze on a fixed point in a room with low light, a progressively brighter and better picture would appear before my eyes, just like a camera can see in the ...
0
votes
1answer
19 views

Energy input during ATP Dephosphorylation?

What is the energy input needed to break the phosphor bond during ATP Dephosphorylation? How and when this will occur? Many thanks for your answers. Edit 1: I know how much free energy (∆G) is ...
0
votes
0answers
102 views

Why did multicellular organisms evolve when a single cell can survive on its own? [duplicate]

Since unicellular organisms can survive, why would there be evolution of multicellular organisms?
1
vote
1answer
34 views

Why did eukaryotic cells develop? [on hold]

If eukaryotic cells can survive in extreme conditions, then why are their still prokaryotic organisms?
1
vote
0answers
17 views

Did the number of rods changed from ancient time?

Correct me if I am wrong, but I know that rods work under limited light conditions only. But now we are in a world that always have lights everywhere unlike ancient time when humans had to deal with ...
0
votes
0answers
3 views

Steps between Expression & Commercialization of a recombinant organism

What are typical steps that follow after one has successfully expressed a hetrologous gene in a host organism before one has a viable industrial process for the metabolite expressed? Let's take E ...
0
votes
0answers
12 views

Glycoprotein hormones metabolism

Why do the carbohydrate groups in glycoprotein hormones decrease the rate of metabolism? And increase the half-life?
0
votes
0answers
6 views

Orangutan Nests - Necessary To Teach Offspring ?

" Young orangutans learn by observing their mother's nest-building behaviour. Nest-building is a leading reason for young orangutans leaving their mother for the first time. " ...
4
votes
0answers
55 views

What causes humans to be physically weak compared to animals like gorillas?

Animals like gorillas seem to have a physical fitness and muscle mass that don't depend as strongly on how much exercise they get, compared to humans. E.g. gorillas living in the wild sleep and rest a ...
0
votes
0answers
24 views

Can you feel what's happening in your brain? [on hold]

There are specific instances in which I feel areas of my brain. I assumed I was making it up because "the brain doesn't have any pain receptors" but recently thought of headaches, and looked online to ...
0
votes
0answers
6 views

Separate replication origin and terminus vs making them one and the same

The classical picture of bacterial reproduction has a replication origin on one side of the circular chromosome and a replication termination area on the opposite end. This essentially creates two ...
1
vote
1answer
18 views

The question of the protein and the ribosome

It is well known that proteins are spit out by ribosomes by reading the DNA that goes in. Now ribosomes are made of proteins. Doesn´t this mean that the riobosome structure came before the production ...
3
votes
1answer
52 views

Could a single cell be brought to life?

If a scientist is observing a single cell under a microscope, and then realizes that the cell has died, is it possible to bring that dead cell back to life? For my inquiry, let's assume that the ...
0
votes
1answer
23 views

Difference between the spinal cord and vertebrae column [on hold]

What is the difference between the spinal cord and the vertebrae column, they both run through from the head to the abdomen. Does any one have any idea.
1
vote
2answers
18 views

How does hypocalcaemia have an effect on the excitability of cell [on hold]

Hypocalcemia increases sodium influx by leak channels. Why does this elevate the resting membrane potential and increase excitability?
0
votes
1answer
21 views

Why doesn't one develop immunity to bacterial STIs?

Why doesn't one develop immunity to STIs such as Chlamydia/Gonorrhea and Syphilis even after the first exposure and treatment with antibiotics?
6
votes
3answers
387 views

What happens if a non-diabetic receives an injection of insulin?

If a person without diabetes or any diabetes-related issues receives an injection of insulin, what happens? Would the blood glucose level drop or does the body naturally compensate for the added ...

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