Questions tagged [medicine]

Medicine is the doctrine of prevention, diagnosis and treatment of diseases and injuries in humans and animals. Health and medicine questions are off-topic unless dealing with the biology underlying health and medicine. Please carefully explore the tour, help centre, and meta before posting health and medicine questions.

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42 views

What fraction of human cells gets infected during a viral infection?

As I understand, if a cell gets infected during a viral infection then it eventually dies. If an individual does not die of an infection, the percentage of cells that gets infected in the course of ...
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59 views

Why is free ribose not reduced to deoxyribose rather than the reduction occuring on ribonucleotides

I cannot understand why deoxyribonucleotides are not synthesized directly from deoxyribose, but ribonucleotides have to be synthesized first, and only then can deoxyribonucleotides be synthesized.
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How would a medication cause a one to maintain a different weight?

This isn’t really a medical question, I’m just really curious about this. I was maintaining weight A and then started taking a medication that brought me to weight B. While on the medication, I ...
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48 views

How can I list genes present on a given series of bands?

My question is related to this one. My interest relate to this deletion: del(7)(q11q36)[12] as defined by ISCN. I would like to access a list of the genes found on the bands 11 to 36 of the 7th ...
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1answer
198 views

Mesoporous silica particles as anti cancer drug delivery method

If this question is a little off topic for Biology, I'm sorry. I've recently read a lot about mesoporous silica nanoparticles as a promising drug delivery method. The huge range of customizability of ...
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1answer
150 views

Stem cell that can pass through blood vessel

I know that blood cells can pass through the smallest of capillaries, but I was wondering is it possible for stem cells to pass through the smallest of capillaries? In other words, is it possible for ...
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1answer
170 views

Why ketoacidosis is less common in patients of Noninsulin Dependent Diabetes Mellitus?

The other day my teacher said ketone bodies are mostly formed when insulin is less and NIDDM type diabetes mellitus has less chances to grow ketosis. https://medlineplus.gov/ency/article/000320.htm P. ...
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88 views

To have a drug travel to a specific place in the body can you just coat the drug in extracellular signals recognized by target cells?

In a lecture of mine the professor was talking about the issue faced in regards to drug therapy when it comes to targeting lung cells in cystic fibrosis. It was said that if unless the drug gets ...
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83 views

Why can't diamine oxidase be supplemented?

I've read from an academic article that diamine oxidase cannot be supplemented but it had no explanation as for why. I am curious as to why this? Food rich in histamine or red wine may cause ...
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1answer
542 views

Do distinctions between dry, tickly and chesty coughs have any medical basis?

Background At least in Britain you normally come across distinct kinds of cough medicine "chesty", "dry" and "tickly". Questions Are "chesty", "dry" and "tickly" coughs always due to microoganisms? ...
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412 views

eye myopia power changes with brightness

Is there a condition where myopic power changes with ambient brightness. When I drive in the morning in bright sunlight my power is -4.0; however when I wear the same -4.0 glass in the evening (dusk ...
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92 views

Why is half dose of Oxford's vaccine of covid more effective than full dose?

I recently read in a newspaper that the half dose of the Oxford's vaccine is 90% effective while the full dose is only 62% effective. Why is this the case ?
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Alzheimer's disease - Hyperexcitability

I am trying to read literature on Alzheimer's disease. A very important phenomenon that occurs in AD patients, is hyperexcitability in neurons close to A-beta concentrations. Some authors only ...
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35 views

Why do vaccines sometimes induce a fever? [closed]

How does a vaccine cause an immune response such as fever? Why do only some people experience these reactions? Why might those reactions change upon subsequent doses of the same or similar vaccines?
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161 views

What's the difference between veterinary and human snake antivenom?

Recently, out of curiosity, I looked online if snake antivenom for humans were actually sold for individuals. I found out they aren't. Not only that, but bills can get really high on countries that ...
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644 views

Why is there such a large evening rise of temperature and night sweats in certain diseases like TB, lymphoma etc?

I've heard that it's got to do something with the levels of cortisol which usually dampens the effects of IL-1, but when it's night time the cortisol levels are usually low so IL-1 response is ...
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276 views

Why do erythrocytes have no MHC1 but platelets do?

Red blood cells do not have a considerable number of MHC1 through their membranes, and that's explained by them not having a nucleus. But why do platelets have MHC1s if they have no nucleus either? I ...
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2k views

What are those brown scars in the eyes? [closed]

I have recently realised that one of my friends had brown scars or marks inside his eyes. He says that he doesn't know what they are and has been there since young. What could this possibly be ? Are ...
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337 views

How does Reissner's membrane rupture cause Ménière's disease symptoms?

In Ménière's disease, an ednolymphatic hydrops (EH) in scala media leads to a distention and, eventually, rupture of Reissner's membrane. This results in an influx of K+-rich endolymph into the Na+-...
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82 views

Which organs can be donated after clinical death?

The information I found about organ donation does not address clinical death. For example: The process of donation takes place only after physicians declare a person brain dead [...] cessation of ...
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40 views

Biomedical consensus on human aging and lifespan [closed]

Medical technology is improving quickly. Unless there is a global disaster and human progress is set back significantly, e.g. by an asteroid or a global nuclear war, there will come a day when humans ...
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0answers
96 views

How is the side-polarity of the myosin filament in myofibril maintained?

If myosin molecules are the properly oriented relative to their position in the the myosin filaments, the sarcomere is not functional. But how is the orientation of the myosin molecules determined? ...
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Source of journals collecting titles of scientific publications regarding clinical trials with dogs fed medicinal herbs

After some time researching on the web, you can find a lot of websites telling you that some herbs may have or have specific properties(unfortunately most seem to be "advertised" as if they were ...
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1answer
106 views

How do painkillers prevent shock?

I was reading about the Placebo effect and came across this little story: The roots of the placebo problem can be traced to a lie told by an Army nurse during World War II as Allied forces ...
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2answers
220 views

Henrietta Lacks Cell Line - Immortality

I'm a newbie in biology and medicine. I understand that Henrietta Lacks provided the cells that formed the HeLa cell line with which much research has been done. Henrietta Lacks died of cancer. If we ...
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1answer
91 views

Why is the current flow shown to be flowing from the negative area towards the positive area?

When I was studying the ECG chapter in the book "Guyton and Hall Textbook of Medical Physiology", I noticed something odd in one of the pictures: As you can see the current is shown to be ...
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2answers
5k views

Should hydrogen peroxide be applied on a bloody nose? [closed]

When I was a kid, my parents taught me to apply hydrogen peroxide on my nose whenever it bled. It's a rare event, but my nose bleeds from time to time, and when it does, I always go through the same ...
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1answer
184 views

Applying drugs to brain via scalp (transdermal)

Many medications are intended only for the brain, but are taken orally. Hence <10% finds its intended target, while the remaining >90% is at best wasted, and at worst causes unwanted side-effects. ...
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1answer
47 views

Which kind of drugs get absorbed through epidermis?

Some drugs such as nicotine can be administered through skin. I thought the layers of skin are designed to prevent in-flow of any chemical/germs. Not all drugs get absorbed in this fashion. So do ...
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1answer
179 views

Why warfarin is given as racemic mixture?

Warfarin is administered as a racemic mixture of S- and R- warfarin. S- warfarin is 3 to 5 times more potent than R- warfarin. So, what's the logic behind giving a mixture of it? Isn't administration ...
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1answer
283 views

Understanding a Chromosomal formula in a karytope analysis

I am reading a medical reporting results of a karyotype analysis. On it it is written: Chromosomal formula 46,XX,del(7)(q11q36)[12]/46,XX[13] I understand that 46 ...
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1answer
567 views

Healing of Skin Superficial Wound

How does the body heal a skin wound without bleeding? I had a wound in which thick layer of skin was gone and which was too painful to touch. I could see the wound secreting clear liquid rather than ...
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1answer
123 views

Is it possible for a person to eat so many carrots that one turns orange?

I once read that Jerry Rubin (a famous 1960s activist) ate so many carrots that he turned orange. (This was in the East Bay Express, around twenty years ago.) I assumed it could be true, though he ...
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1answer
44 views

Is it a medical condition to not able to recall the word in a language while having a conversation [closed]

While having a conversation it happens to some peopl that clearly they know there exists a perfect word to be used but can not recall it during the conversation in real time and hence forced to use ...
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2answers
199 views

Why are nausea and dizziness such common side effects from medication?

Why are nausea and dizziness such common side effects from medication? If you go through your medicine cabinet and look at side effects, those might just be on every single bottle. Is there some ...
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1answer
141 views

Gene Therapy for Cystic Fibrosis

I have another question regarding cystic fibrosis. I understand that gene therapy is currently being talked about in the cure for cystic fibrosis. I know that Eric Alton at imperial college London is ...
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2answers
100 views

What are the physiological effects of retinal exposure to 380–400nm light?

There are two categories of sunglasses: UV380 sunglasses block all light with wavelength 380nm or lower, while UV400 sunglasses block all light with wavelength 400nm or lower. This made me wonder, ...
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1answer
45 views

How does the age of a parent affect the chances of occurrence of certain genetically transmitted diseases?

Do genetically transmitted age-related diseases (like hypertension, arthritis etc.)have the probability of occurring at an earlier(younger) age in the offspring if they are born at a later age to ...
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1answer
1k views

What is a Archival Tumor Tissue ? For What Purpose is it collected?

Over the course of Conducting trials various tissue and tumor samples are collected from the patients. One such sample is the Archival Tumor Tissue. Could someone kindly clarify what is the meaning ...
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2answers
125 views

Could a human become infected with rabies in such a way that even prior vaccination wouldn't stop the infection?

Given the highly persistent nature of rabies after entering the brain, I was wondering whether certain ways of exposure to this virus could be risky even for a previously vaccinated individual. I ...
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1answer
209 views

Why is chronic lymphocytic leukemia (CLL) most common leukemia in the West but so rare in Asia?

In "Advances in Chronic Lymphocytic Leukemia" (2013, Edited by Sami Malek), several times it is stated that CLL is very common in Western countries. However, it is quite rare in Asia. (I do not have ...
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1answer
2k views

How does the body respond to blood donation; are there any possible risks?

Can blood donation cause any harm to the donor? I have been told so, but cannot find any references supporting this claim. I have also learned that our body will replace the lost fluids within 24 ...
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1answer
383 views

Is it possible for a human to get rabies from a rabies vaccine meant for dogs?

What would happen if a human was injected with a rabies vaccine meant for dogs? I know vaccines can contain weak or dead strains of the virus, but is it possible that the human could become infected ...
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2answers
58 views

Can erythrocytes Function without plasma?

my title is not very specific. So i will proceed to clarify it. I am trying to make sure that the only blood cells in a sample are Erytocytes, since i want to evaluate their metabolism, I am aware ...
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1answer
19 views

Does Cholestyramine (CSM) raise Tyramine levels?

This is a layman's question. Will ingesting Cholestyramine (CSM, the resin, in powdered form to be specific) raise tyramine levels? I am asking because Cholestyramine clearly has "tyramine" in its ...
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1answer
268 views

Difference between “controlled release” vs “prolonged release”

My sister is using the epilepsy drug Tegretol which has both CR and retard (previous naming for prolonged release according to https://www.medicines.org.uk/emc/product/5932/smpc) versions in different ...
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1answer
51 views

How is Pseudomonas aeruginosa diagnosed?

I know that P. aeruginosa is cultured on an agar plate, but which media or assays make it distinct from other Gram-negative bacteria?
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1answer
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Is hydroxyproline an amino acid? (Classification question)

So I know that hydroxyproline is created from proline via hydroxylation as a post-translational modification. I also know that proline is considered an amino acid. However, once you hydroxylize it, ...
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1answer
99 views

Rabies virus mortality [duplicate]

Why rabies virus has nearly 100% fatality rate in human (see this virology blog; thanks to @iayork for the link) if not vaccinated early, even some people have survived Ebola, then why does rabies doe ...
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1answer
2k views

Why cornstarch for athlete's feet?

It seems like a lot of foot (anti-odor or antifungal) powders are often based off of cornstarch (i.e., as the primary filler). But wouldn't cornstarch (which, in some places, is also a common food ...