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Is It Possible to Re-donate an Organ You Received?
It would have to pass the transplant requirements and that's basically it. If for example you were donated a liver and you don't drink much and otherwise keep yourself healthy there is nothing stopping you from later donating part of it, it is still a functioning and healthy organ.
It would have to pass the transplant requirements and that’s basically it. If for example you were donated a liver and you don’t drink much and otherwise keep yourself healthy there is nothing stopping you from later donating part of it, it is still a functioning and healthy organ.
See lessCan We Naturally See DNA Structures Without Visual Aids?
Non of our senses can resolve that level of detail. You can isolate DNA, put enough of it together and see it with your naked eye, it will look like a white clump of matter, but that's about it. As for the helical shape appearing in ancient symbols. That is pretty much expected, nature has a tendencRead more
Non of our senses can resolve that level of detail. You can isolate DNA, put enough of it together and see it with your naked eye, it will look like a white clump of matter, but that’s about it.
As for the helical shape appearing in ancient symbols. That is pretty much expected, nature has a tendency to curve stuff, helical shapes are common in nature because they are very spatially efficient – they make for a compact rigid structure, that’s why snail shells are curved and you see Fibbonaci spirals everywhere on different size scales in nature.
Humans are naturally curious beings with a tendency to search for patterns around us, so naturally spirals are something that would be expected in ancient symbolism.
See lessCan Cartilage Turn to Bone Elsewhere After Age 40? Explore the Process!
It begins ossifying around age 3 and often completes ossification around age of 18-25, but can be as late as 40-60. The superior portion which is the ossification center is made of hyaline cartilage, which is the same as that which exists in your long bones, vertebrae, and elsewhere. the inferior poRead more
It begins ossifying around age 3 and often completes ossification around age of 18-25, but can be as late as 40-60. The superior portion which is the ossification center is made of hyaline cartilage, which is the same as that which exists in your long bones, vertebrae, and elsewhere. the inferior portion is elastic cartilage. It ossifies via the same process as others via endochondral ossification.
Parathyroid hormones are responsible for ossification, but the body doesn’t decide to ossify bones at specific ages, rather, it is a process that continues from gestation until it is fully ossified.
See lessAre Illness Symptoms Your Body’s Defense or the Illness Itself?
The answer for your question will be different for every disease, but symptoms can be either. For example a bacterial infection could be releasing toxic chemicals that harm you, and also your body could be running up a fever to kill the bacteria.
The answer for your question will be different for every disease, but symptoms can be either. For example a bacterial infection could be releasing toxic chemicals that harm you, and also your body could be running up a fever to kill the bacteria.
See lessHow Does Your Digestive System Selectively Release Enzymes?
When the food passes into the duodenum, cells in the intestinal lining will detect if there are any proteins or fats present. If there are, these cells release cholecystokinin, which triggers the gall bladder to contract and release gall as well as the pancreas to release its enzymes. I could be wroRead more
When the food passes into the duodenum, cells in the intestinal lining will detect if there are any proteins or fats present. If there are, these cells release cholecystokinin, which triggers the gall bladder to contract and release gall as well as the pancreas to release its enzymes.
I could be wrong, but I think lactase is not triggered by lactose and is continuously produced by enteroendocrine cells.
See lessWhat Changes Do Tendons Undergo for Increased Strength?
Tendons can remodel to an extent, thought it's not nearly as quick or as dramatic as what can happen to bone or muscle. Tendons can get thicker, which also make them stiffer (more resistant to stretching). At the molecular level the effects are pretty mixed from the literature! One issue is that tenRead more
Tendons can remodel to an extent, thought it’s not nearly as quick or as dramatic as what can happen to bone or muscle.
Tendons can get thicker, which also make them stiffer (more resistant to stretching). At the molecular level the effects are pretty mixed from the literature! One issue is that tendon is a relatively inert tissue post skeletal maturation, at least in humans.
Good summary can be found here:https://pubmed.ncbi.nlm.nih.gov/27150831/
Tendon rupture and tendinopathies are *very* common in middle age, especially in males who are revisiting exercise after a lapse. The trouble with exercise is that your muscles and bones can remodel in later life pretty effectively, but the tendons don’t keep as well.
See lessWhat Burning Questions Do You Have About Breastfeeding Science?
Are any babies lactose intolerant? If so, do they react to breast milk the same way a lactose intolerant adult reacts to dairy with lactose?
Are any babies lactose intolerant? If so, do they react to breast milk the same way a lactose intolerant adult reacts to dairy with lactose?
See lessHow Do Medications Like Iron Supplements Trigger Vivid Dreams?
Makes the brain or entire nervous system operate differently???🤷♂️ I've semi recently started LDN for long covid, but everytime I titrate up I have crazy vivid dreams. Starting 4mg today so I expect to have extra dreamy dreams for 5-7 days.
Makes the brain or entire nervous system operate differently???🤷♂️ I’ve semi recently started LDN for long covid, but everytime I titrate up I have crazy vivid dreams. Starting 4mg today so I expect to have extra dreamy dreams for 5-7 days.
See lessIs there a feedback mechanism that helps bones grow to the same length in our body?
[This Wikipedia article on Morphogens](https://en.m.wikipedia.org/wiki/Morphogen) might help you understand. Certain substances are secreted by the body during early development and their concentration affects how cells develop. So cells farther away will act differently than those close.
[This Wikipedia article on Morphogens](https://en.m.wikipedia.org/wiki/Morphogen) might help you understand.
Certain substances are secreted by the body during early development and their concentration affects how cells develop. So cells farther away will act differently than those close.
See lessHow do cancer cells evade the immune system?
Survival of the fittest. Immune system generates selective pressure for cancer cells that are adept at avoiding immune system. There are many different mechanisms to achieve this. Most fundamental one is shutting down the intrinsic emergency system. Normally, once a cell senses that there is somethiRead more
Survival of the fittest. Immune system generates selective pressure for cancer cells that are adept at avoiding immune system.
There are many different mechanisms to achieve this. Most fundamental one is shutting down the intrinsic emergency system. Normally, once a cell senses that there is something wrong with its cell cycle, it initiates apoptosis. If this system also fails, it release chemical signals to fetch immune cells to initiate apoptosis for it, or it kill it directly.
Next line of defense is the cells surrounding the cancer cells. If these cells sense unusual behavior, they will rat out the cancer cell to immune cells. But cancer cells also develop mechanisms to suppress this system.
There are other backup mechanisms, but cancer cells basically accumulate mutations selected by the selective pressure immune system generates.
See lessDoes post nasal drip lead to sore throat? Find out why!
It's mostly from the continuous exposure physically and chemically disrupting the normal throat mucosal protection, potential inflammatory molecules in the drainage both self and foreign, and probably the most important: mouth breathing leading to dryness which itself can cause irritation but also wRead more
It’s mostly from the continuous exposure physically and chemically disrupting the normal throat mucosal protection, potential inflammatory molecules in the drainage both self and foreign, and probably the most important: mouth breathing leading to dryness which itself can cause irritation but also will exacerbate any irritation already present.
See less“What impact does Beano have on your microbiome?”
The consumption of Beano shouldn't interfere with the equilibrium of the microbiome. It’s an enzymatic protein that breaks down diverse sugar molecules in these food items. The mechanism is similar to how individuals with lactose intolerance take Lactaid products. Lactaid is, in essence, the lactaseRead more
The consumption of Beano shouldn’t interfere with the equilibrium of the microbiome. It’s an enzymatic protein that breaks down diverse sugar molecules in these food items. The mechanism is similar to how individuals with lactose intolerance take Lactaid products. Lactaid is, in essence, the lactase enzyme in a pill form. They navigate the usual digestive process and are eventually excreted through the fecal matter.
See lessCan eye color really change over time due to genetics or aging?
I don’t know the specifics for eye color and geriatrics, but eye color isn’t actually a Mendelian genetic trait (meaning that it’s controlled by a single allele pair). It’s actually multi-factorial, the idea of eye color as a Mendelian model trait is a common myth in biology.
I don’t know the specifics for eye color and geriatrics, but eye color isn’t actually a Mendelian genetic trait (meaning that it’s controlled by a single allele pair). It’s actually multi-factorial, the idea of eye color as a Mendelian model trait is a common myth in biology.
See lessHow does the human body prevent and resolve blood clots?
PubMed (StatPearls section) and Wolters Kluwers (Beyond the Basics) are probably better sources to learn about coagulation than WebMD. Essentially, the blood vessels contain proteins that create a balance between clotting/clot prevention/clot breakdown. The clotting factors also know as tissue factoRead more
PubMed (StatPearls section) and Wolters Kluwers (Beyond the Basics) are probably better sources to learn about coagulation than WebMD.
Essentially, the blood vessels contain proteins that create a balance between clotting/clot prevention/clot breakdown.
The clotting factors also know as tissue factors are present in inactivated forms. Damage to blood vessels and platelet activation drive the ever increasing conversion of these factors to stabilize clots and promote thrombosis.
On the other side, there are proteins (anti-thrombin, Proteins c and S) that prevent the activity of these activated clotting factors.
Plasmin, as the other user described, is the activated form of plasminogen that breaks down formed clots.
The balance of these proteins is what leads to excessive bleeding or clot formation. It ranges from diet (example of Vitamin K necessary to form clots), inherited deficiencies (like Hemophilia in the European family), and medical conditions (ongoing therapy, malignancies).
See lessHow do genetics and the environment interact?
Hi team. Why do humans across the globe experience certain similar experiences even when no one has told us anything familiar, such as imagining a guy running when we are in car as kid, creating finger rings around flowing tap water, etc. Thanks.
Hi team. Why do humans across the globe experience certain similar experiences even when no one has told us anything familiar, such as imagining a guy running when we are in car as kid, creating finger rings around flowing tap water, etc.
Thanks.
See lessWhat stops human body from rejecting tattoos?
When tattooing, water-insoluble color pigments are pierced into the skin. It used to be assumed that the tattoo remained permanent because the ink colored connective tissue cells. However, French scientists have now been able to show in mice that the color particles are deposited in phagocytes - so-Read more
When tattooing, water-insoluble color pigments are pierced into the skin. It used to be assumed that the tattoo remained permanent because the ink colored connective tissue cells.
However, French scientists have now been able to show in mice that the color particles are deposited in phagocytes – so-called macrophages.
When these cells die, the pigments are initially released, but only until they are taken up again by new macrophages.
As the researchers from Aix Marseille Université report in the journal “Journal of Experimental Medicine”, the particles remain largely in their original position during this process, so that the tattoo does not change noticeably.
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