Why do some viruses, such as influenza, quickly mutate (thus require different vaccinations annually), but other viruses, such as smallpox seem to barely mutate at all (or at least much more slowly)? |
- Why do some viruses, such as influenza, quickly mutate (thus require different vaccinations annually), but other viruses, such as smallpox seem to barely mutate at all (or at least much more slowly)?
- What is the advantage of Iris vs Slit eyes?
- During the ancient time, one of the torture methods in China is to put salt on every open wound. How does salt enhance our pain receptor?
- Why can't we delay menopause forever with the use of HRT?
- When a person needs a ventilator (as in C-19), is this because the diaphragm and intercostal muscles are fatigued/degraded to the point where they can no longer move sufficient air to support gas exchange?
- How is the distinction between diaphysis, metaphysis, and epiphysis determined in the embryonal stage?
- Are there drugs that can temporarily increase the permiability of the Blood Brain Barrier?
- If we can't see UV light why does a room get brighter if UV is used to disinfect it?
- Is there any animals that does not eat any plants at all?
- What keeps the ISS stable when a craft docks with it?
- On Diamond Princess researchers found coronavirus RNA 17 days after the ship was vacated. Does this suggest that we can get Coronavirus from surfaces up to 17 days later?
- Is it likely that there is a genetic component to whether Coronavirus is survivable?
- What is the covid19 mortality rate among healthcare workers?
- Why does inbreeding cause so many health problems?
- Can a disease kill another one?
- What's the peer-reviewed literature on women being more willing than men to believe in astrology, religion, superstition, or otherwise non-science explanations of the world? Is this just anecdotal observations or is has it been studied?
- How do broken bones mend themselves?
- Could you make a “blind” person see color?
- Is there a lower bound to how much energy a photon can lose due to red-shifting?
- What makes bats the usual suspects for dangerous new viruses? Do they have more viruses than other animals? And do we know where the viruses they carry originate?
- How many star that we see now are dead?
- Approximately what percentage of the stars we see in the sky are stars rather than distant galaxies?
| Posted: 29 Mar 2020 10:19 PM PDT |
| What is the advantage of Iris vs Slit eyes? Posted: 29 Mar 2020 08:34 AM PDT I'm confused on why some animals have slits instead of irises. Because even animals of the same type have different shapes. [link] [comments]  |
| Posted: 30 Mar 2020 04:59 AM PDT |
| Why can't we delay menopause forever with the use of HRT? Posted: 30 Mar 2020 04:16 AM PDT Well, not forever I suppose. Just until the end of said non-menopausal persons life. [link] [comments]  |
| Posted: 30 Mar 2020 12:19 AM PDT I am trying to understand what causes a person to require a ventilator in the case of pneumonia or ARDS, particularly in COVID-19. My understanding is that the. Pneumonia may cause both obstruction of airflow as well as inhibition of gas exchange as fluid builds up. At some point, mechanical ventilation may be required to maintain airflow. Is this because of muscle fatigue/damage? Is there a neurological component? I have many other questions which are related to this. I would like to know how best to find answers to these. For example, Are these muscles just over worked or are they damaged by hypoxia, malnourishment, viral damage or something else? What factors might delay or prevent the need for mechanical ventilation? Could increase mass and tone of diaphragmatic and intercostal muscles affect this? Does the early use of oxygen therapy reduce the strain and postpone fatigue? Could better nutrition support muscle repair during periods of sustained respiratory distress? Could periodic use of a ventilator allow time for these muscles to rest and recover? Etc. [link] [comments]  |
| Posted: 30 Mar 2020 07:40 AM PDT I know some of the basics of long bone development: how the bones grow in length due to interstitial growth, how cartilage is mineralised, and how the cortex develops. But I'm missing the difference between diaphysis, metaphysis, and epiphysis in the embryonal stage. Where do they start to differ in development? [link] [comments]  |
| Are there drugs that can temporarily increase the permiability of the Blood Brain Barrier? Posted: 30 Mar 2020 08:34 AM PDT Now, I will admit right off the bat I am not a medical professional nor am I medically trained in any way, so I may be asking the wrong sort of question, but my understanding is that the Blood Brain Barrier prevents large molecules and cells from entering the brain from the drug stream, including many drugs and elements of your immune response including immune cells and antibodies. This, for example, results in rabies being practically impossible to survive once developing symptoms as any treatment you receive won't be able to cross into the brain and fight the virus. Are there drugs out there that can temporarily increase the permeability of this barrier, allowing things like antibodies and immune cells to cross into your brain? Would this be safe, even if we could do it? [link] [comments]  |
| If we can't see UV light why does a room get brighter if UV is used to disinfect it? Posted: 29 Mar 2020 10:09 PM PDT |
| Is there any animals that does not eat any plants at all? Posted: 30 Mar 2020 04:32 AM PDT I know that cats and snakes are some of the obligate carnivores which means 70% of their diet are based on meat but, I read that both of these animals do eat plants for digestion. Also, I heard someone said that there has yet been any pure carnivores observed in nature? Is that true? [link] [comments]  |
| What keeps the ISS stable when a craft docks with it? Posted: 29 Mar 2020 03:13 PM PDT When a craft docks with the ISS how does it compensate for the force exerted on it by the other craft docking. Why is it able to maintain its stability and not spin out of control. [link] [comments]  |
| Posted: 29 Mar 2020 06:23 AM PDT In this study, the CDC and Japanese officials found that coronavirus-covid 19 RNA was found in the Diamond Princess cruise ship as much as 17 days after the ship was emptied: https://www.cdc.gov/mmwr/volumes/69/wr/mm6912e3.htm?s_cid=mm6912e3_w The study is summarized in a press report here: http://www.infectioncontroltoday.com/covid-19/coronavirus-causes-covid-19-stays-undisinfected-surfaces-17-days However in this study researchers studied found coronavirus COVID-19 only lasted for a much shorter time. They found it was "detectable in aerosols for up to three hours, up to four hours on copper, up to 24 hours on cardboard and up to two to three days on plastic and stainless steel." - New coronavirus stable for hours on surfaces | National Institutes of Health (NIH) https://www.nih.gov/news-events/news-releases/new-coronavirus-stable-hours-surfaces That article is summarized by USA Today here: https://www.usatoday.com/in-depth/news/2020/03/25/coronavirus-survives-on-metal-plastic-cardboard-common-objects/2866340001/ I have bad asthma and am trying to stay home. Do I need to be concerned that my groceries, Amazon deliveries, etc. may be a means of transmission for up to 17 days from when I get them? [link] [comments]  |
| Is it likely that there is a genetic component to whether Coronavirus is survivable? Posted: 29 Mar 2020 08:05 AM PDT There seem to be hotspots for Coronavirus fatalities (Italy for example), as I understand it what actually kills people is a massive overreaction from their immune system, is it likely that a persons genetic makeup plays a part, so groups of people with a similar genetic makeup (people related in some way) could be more (or less) susceptible to the infection (there seems to have been relatively few fatalities in Germany). [link] [comments]  |
| What is the covid19 mortality rate among healthcare workers? Posted: 29 Mar 2020 11:36 PM PDT Hi redditors. Do any of you know of any official data on covid19 mortality rate of healthcare workers (by country, preferably)? I would be very interrested to learn more about this. [link] [comments]  |
| Why does inbreeding cause so many health problems? Posted: 29 Mar 2020 02:36 PM PDT I think it's something to do with having such a limited gene pool, but why does that cause so many negative effects? [link] [comments]  |
| Can a disease kill another one? Posted: 29 Mar 2020 04:35 PM PDT Can a pathology(I dont know if this is the correct term) kill an invading virus? I've been thinking about that amid this corona virus hysteria. My mother has miastenia gravis, a very rare disease, to make it brief, antibodies attack the host and external agents, instead of attacking only external agents, I've been thinking if there is a possibility of surviving the covid 19 thanks to the aggressive behavior of the immune system, killing every symptom or at least most? I am asking because the question appeared yesterday in my head but I found nothing in google about diseases killing other external agents. My mother rarely get a fever or any common flu, even with miastenia gravis. pd: I am in no way someone knowledgeable in medicine or human body biology but I've learned a bit in school, though is nothing compared to a real introduction to biology, it's something hehe. [link] [comments]  |
| Posted: 30 Mar 2020 05:55 AM PDT If there does seem to be a correlation, has anyone looked into the explanation? Is it social? Is it genetic/biological? [link] [comments]  |
| How do broken bones mend themselves? Posted: 29 Mar 2020 11:24 AM PDT I recently broke my foot and it blows my mind my bones will grow back together without any screws in place. How does that work? [link] [comments]  |
| Could you make a “blind” person see color? Posted: 29 Mar 2020 11:03 PM PDT This experiment obviously wouldn't ever be conducted due to ethical reasons, but it is a common thing to try and describe color to someone who was blind at birth. They have no idea what color is or anything about color at all. This then usually leads to the question, "what if we were able to make a blind person see" and then that's the end of the question because currently we don't have the ability to do that. Here's my experiment: What if we blindfolded a baby at birth and then took it off of them at 18? Would they see this color and be overwhelmed? Obviously they can see black and maybe red (the color of blood in their eyelids) but would that be it? Would their brain not be able to process the other colors or would they develop sight. There brain isn't as plastic as a babies so this may not be possible but surely they would see something right? If anyone has any background in something like this or anything I'm really interested to see what your ideas would be. [link] [comments]  |
| Is there a lower bound to how much energy a photon can lose due to red-shifting? Posted: 29 Mar 2020 02:16 PM PDT My understanding is that a photon which escapes a gravity well will be red-shifted due to the energy lost (increased wavelength). Given the gravity well of an *arbitrarily massive* body, is there no limit to the amount of energy lost from a photon escaping at an angle perfectly opposite to that of the gravitational pull? Could a photon's wavelength, theoretically, reach massive distances to accomodate for the energy lost? And a follow-up question: If there is a lower bound to the amount of energy lost from a photon escaping a gravity well, is there something special about this lower bound? Thank you and I apologize if this question contains any misinformation or false assumptions, I'm still learning a lot about physics. [link] [comments]  |
| Posted: 29 Mar 2020 11:29 AM PDT |
| How many star that we see now are dead? Posted: 30 Mar 2020 12:57 AM PDT Light takes a long time to travel all the way from those stars to us. If I recall some stars are dead but we still see their light, so are there any estimates for how many stars are dead? [link] [comments]  |
| Approximately what percentage of the stars we see in the sky are stars rather than distant galaxies? Posted: 29 Mar 2020 10:11 AM PDT |
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