-4
votes
1answer
30 views

How big a box would it take to hold all of humanity? [on hold]

If it is conservatively estimated for expediency, especially considering the temporal nature of the question (the answer will change in 20 years), what size box does it take to hold humanity (just ...
1
vote
1answer
14 views

Burning fat transferred from one part of the body to another

While doing some research on cosmetic surgery, I discovered that there are several ways of doing breast enhancements, one of which was using body fat. While I haven't researched this method, I assume ...
-1
votes
0answers
10 views

Why do fungi need water? [on hold]

I have an assignment in which I have to explain why fungi need water, air, sunlight temperature and food. If plants soak up water from their roots, do fungi do the same thing? If so, what do they use ...
1
vote
1answer
17 views

Is the activity of enzymes in the human body affected by the outer temperature?

I have to do a research about the enzymes in the human body and the things that affect them. I know that the body temperature affects the activity of enzyemes but I'd like to know if the outer ...
1
vote
1answer
22 views

Is there a maximum size for an insect?

I have read in biology text-books that one of the most important constraints on the size of an insect happens to be the importance of the surface-volume ratio. It simply states that if we assume ...
1
vote
1answer
14 views

Help me understand my membrane potential assignment

Epithelial with the ability to transport NaCl is bathed in an isotonic salt solution with these values (in mM): 136 Na, 6 K, 140 Cl. The intracellular concentrations are: 45 Na, 100 K, 13 Cl. The ...
2
votes
0answers
13 views

Which organs in the body are responsible for measuring temperature?

As an instrumentation engineer, I have designed temperature control systems capable of measuring and controlling temperature with a precision of 0.001K over a wide temperature range. I have always ...
0
votes
0answers
6 views

Does dendrite have Na/K electrical channels?

Does dendrite have Na/K electrical channels if not so how can we sense the touche/pain/scald in our skin because we learned that Na/K electrical channels are present only in nerve fibers (axon).In ...
4
votes
0answers
13 views

Hill's function for translational regulation

Transcriptional regulation is generally modeled as a Hill's function (similar to Michaelis-Menten Kinetics): $$\frac{dm_X}{dt}=\alpha _{m_X}.\frac{R}{K+R} -\beta _{m_X}.m_X$$ Where $m_X$ is the mRNA ...
-1
votes
0answers
30 views

Accelerated tree growth [on hold]

Can someone explain to me the growth of a redwood tree after it is cut just above the ground, if that happens at all? Also if it does, what would it look like during an exponential growth spurt, but ...
-1
votes
0answers
15 views

Eukaryotes and Genetic Modification [on hold]

Assuming endosymbiotic hypothesis on Mitochondria evolution, is it feasible that humans could Genetically modify ourselves ... As far as it comes to a cell producing Mitochondria, are they present in ...
0
votes
0answers
27 views

Clustal X command-line version [on hold]

I downloaded a precompiled executables CLUSTAL software from http://www.clustal.org/clustal2/. When a .dmg file was downloaded, I tried clicking it but then it pops up: ...
1
vote
1answer
26 views

What is the name of the critter depicted in the attached image?

I found a critter on my bathroom towel. It's really tiny. Maybe 2 milimetres? I placed it on an envelope for the photograph. Can someone identify what it is?
2
votes
1answer
12 views

Why is the vermis of the cerebellum associated with speech?

I've found multiple sources claiming that damage or impairment as a result of alcohol to the vermis of the cerebellum results in speech impairment. I find this a bit surprising, since the only areas I ...
1
vote
1answer
24 views

How can I compare the STRIDE and DSSP output files of a particular pdb file?

I have the pdb file of H-ras protein 5P21.pdb. I am supposed to compare the output of DSSP and STRIDE files after feeding this pdb file to respective servers. My question is how to make a quick ...
1
vote
1answer
87 views

What kind of fly is this?

I found this dude hanging out in my sink, but he didn't fly away when I put a dish in the sink. Turned out it was dead. The front part looks exactly like a housefly. But, I've never seen the back end ...
1
vote
0answers
18 views

What is the difference between rheobase and threshold?

What is the difference between rheobase and threshold? In the definitions I've read it's described as almost the same thing and when I asked my professor he couldn't convince me so can you give a ...
0
votes
1answer
7 views

What is the difference between the basal membrane and the basal lamina?

I'm researching about the basal lamina in lung tissue and I'm not sure if the basal membrane is the same. What is the difference between them?
1
vote
2answers
17 views

How does non-homologous end joining (NHEJ) work?

I was reading about non-homologous end joining (NHEJ) in my molecular biology of the gene textbook but the explanation provided in the text was rather vague to me, and I was not able to understand it ...
3
votes
1answer
23 views

How are chickens affected by light?

When I was young, I was told never to put a fluorescent light in a hen house because it continuously turns on and off. Extra lighting is used, as far as I know, to 'extend' a chicken's day. Human eyes ...
1
vote
1answer
33 views

Which immunosuppression caused by long-term usage of these antibiotics in untreated celiac disease?

These antibiotics include amoxicillin + acidum clavulanicum (beta-lactam, inhibit cell wall synthesis, broad specturm, 3rd gen aminopenicillin) / last part preventing the resistance ceftriaxone (3rd ...
1
vote
0answers
16 views

Like size and colour constancy, why does the brain not maintain focus constancy?

I have progressive myopia. I grew up with perfectly normal eyes but slowly started getting myopic. The thing is, my brain knows (or should know) what the world looks like -- it knows that far away ...
1
vote
0answers
17 views

A good introductory book to histology?

Like the title says, I am looking for a good introductory text to histology. It would ideally cover sample preparation microscopy staining, and several example experiments Suggestions?
17
votes
3answers
1k views

Why do we need red blood cells?

From what I know, the main function of red blood cells is hemoglobin transport. So, why do we need cells packed with hemoglobin: why can't it travel freely in the bloodstream? My own thoughts were: ...
0
votes
2answers
47 views

What are the genus and species name of different breeds of dog?

Can you refer me to a good source containing the genus and species name of different breeds of dogs?
1
vote
1answer
13 views

Lateral corticospinal tract and termination

I'm studying the motor pathways of the brain and I'm a bit confused about how the lateral corticospinal tract descends. From Neuroanatomy: Text and Atlas by ...
2
votes
1answer
29 views

What is the mechanism of reflex arcs?

When a reflex arc occurs the signal from the receptor passes straight to the motor neuron instead of being passed onto the brain. This is a rather simplistic explanation, I was hoping to make it more ...
1
vote
1answer
23 views

Are there organisms that have incorporated plastic into their lives?

Are there organisms that have incorporated (manmade) plastic into their lives in any way? Either in their diet, or as a part of their body?
1
vote
0answers
18 views

Regarding benign tumors and what 'stops' them

Benign tumors can grow to dangerous size yet are they capable of metastisizing ; if not what stops this? Also with a benign tumor if you call its cells 'near' its edges its tumor 'cell wall' I was ...
0
votes
1answer
49 views

About the plight of Elephants and efforts to conserve them? [on hold]

Poachers are only after the ivory horns right? I read this story from the New York Times ( I think) of saving a Rhinocerous by some Park Rangers and a Vet. ( forgive spelling) ; they tranquilized the ...
0
votes
0answers
24 views

Nystagmus drug FDA approval?

Congenital Nystagmus is an eye focusing disorder. It happens in manuals. Wikipedia lists several treatments on its page. Are any of those FDA approved for human use of that disease. drugs found ...
0
votes
0answers
11 views

are cranial nerves responsible for the fault mechanism [duplicate]

how speech is produce and why people stammer during the speech. What factor is culprite for the fault mechanism? Is it nerves?
0
votes
0answers
21 views

MRI with lots of white matter.

Why might an MRI show a large amount of white matter and a low amount of gray matter yet have a full skull with little shrinkage in an above average intelligence primate?
1
vote
0answers
32 views

How to visualize the ECM?

Specifically, I'd like to look at changes in HA (hyaluronic acid) production. Most often you only see people staining the cell surface or removing cells from culture for fixation and then imaging. ...
5
votes
2answers
30 views

Alternatives to trypsin for cell detachment?

I have ran out of trypsin and need to passage my cells (immortalized chondrocytes, C28/I2) today or tomorrow. I have been out of town and forgot to order more trypsin. I was wondering if there are ...
2
votes
0answers
12 views

Why is gynodioecy common and androdioecy rare?

Gynodioecy is when a population features individuals that produce both male and female gametes and individuals that produce just female gametes. Androdioecy is when a population features individuals ...
3
votes
2answers
61 views

How does protein denaturation work?

I was wondering how protein denaturation works. Are there covalent bonds, such as disulfide bridges involved, or is it based purely on non-covalent bonds such as hydrogen bonds? Why is denaturation ...
0
votes
0answers
23 views

are nerves culprit for stammering habit [on hold]

i have been stammering from 9 years old till date[18] . I find different resons for stammering according to people. What is science behind it and how it can reduce?
1
vote
2answers
43 views

How does high-fidelity of DNA replication depend on the formation of hydrogen bonds?

Replication has an error rate of less than 1 in 100 million. DNA polymerase forms H-bond with the H-bond acceptor atoms in the minor groove. <-- enhance fidelity here? Binding of the triphosphate ...
8
votes
1answer
1k views

How long does the Ebola virus remain infectious on contaminated items or surfaces?

I'm sure there will be variation depending on what the contaminated item or surface is made of - linens, I could imagine, would remain dangerous for longer than a door-knob. But if the items are not ...
2
votes
0answers
11 views

How many cells in apical meristem

How many cells are there in the apical meristematic tissue? Looking at this picture... I would tend to think that there are few hundreds (maybe only a hundred) cells in the meristem tissue. But I ...
0
votes
0answers
27 views

Can Hepatitis be caused by Bacteria?

There are many information about viral hepatitis. But it is interesting for me, can bacteria cause the hepatitis too?
1
vote
1answer
52 views

What are the disadvantages of forbidding flights to and from the African Ebola region?

After looking through the available Stack Exchange sites, this one seems to come closest to the appropriate place to ask... Popular opinion, including my own, is that banning flights to and from the ...
2
votes
1answer
21 views

Does DNA replication in 5' to 3' (leading strand) need RNA primase?

https://www.youtube.com/watch?v=27TxKoFU2Nw In the above video it shows that during DNA replication, the lagging strand require RNA primase to add 3' -OH group for further addition of nucleotides. ...
1
vote
1answer
28 views

What are the risk factors of elevating legs for too regularly and when tired?

I started to to think the pathophysiology of elevating legs high next to the wall too often and when you are tired. I think possible manifestations some damage to valves of the veins (No!) because ...
0
votes
0answers
19 views

How to change color of urine safely? [on hold]

I am trying to find a SAFE way to change the colour of my urine, from what I have read online, Methylene Blue is relatively safe, and will change urine to blue or green. Is it safe? Can I put this in ...
-3
votes
0answers
18 views

Minerals and water transportion in a tree [on hold]

I need to explain how minerals and water are first absorbed and then transported in a tree. Include the factors that affect this.
0
votes
1answer
26 views

Book-recommendation: Biochemistry

I need to have a book which covers following topics two may also be fine: (a) Structure and role of carbohydrates, fats, fatty acids and cholesterol, proteins and amino-acids, nucleic acids. ...
0
votes
0answers
14 views

Book-recommendation: Economic Zoology

I need to have a book which covers following topics two may also be fine: (a) Apiculture, sericulture, lac culture, carp culture, pearl culture, prawn culture, vermiculture. (b) Major infectious ...
0
votes
0answers
10 views

When we vomit how are the contents transferred to stomach/esophagus?

For example if a neurotoxin is to be flushed out through vomiting, it will be absorbed into blood and then sent to stomach/gut. Where does this transfer from blood to gut occur?

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