If a heart is a muscle, why doesn’t it ever get tired of beating but things like my arms and legs do? |
- If a heart is a muscle, why doesn’t it ever get tired of beating but things like my arms and legs do?
- I’m currently going through puberty and was wondering if anyone can explain the science behind voice cracks?
- In chemistry I learned that H+ ions in water will very rapidly react to form H3O+ ions. In biology I learned about various proton pumps and gradients, and all the diagrams amd material seem to indicate that it's H+ ions being pumped. What's actually going on here?
- How are scientists getting estimates of 40-80% of populations that will contract the Coronavirus?
- In a life or death situation, could two patients be placed on a single ventilator COVID-19?
- How does the initial viral load at exposure impact the immune system's response?
- Are plants also susceptible to catching viruses?
- Why doesn't the flu die out like other viral diseases like SARS or MERS?
- What percentage of Covid19 cases that end up on a ventilator ultimately survive?
- Can we tell if any civilisations have been wiped out due to an epidemic by analysing their fossils?
- Does Marine life suffer from epidemics/pandemics such as those that afflict terrestrial life? Also, if so how does contagion happen?
- Why does earthquake seem to always propagate from 1 source point?
- How does Shazam and other apps like Shazam work?
- When developing a new drug how do they know what dose to give to test subjects without killing them?
- Why doesn't your body make antibodies/kill viruses during the incubation period?
- How do scientists determine the origin of a pandemic so specifically?
- Why is the WIMP theory the most popular theory as to the makeup of dark matter?
- What's the difference between industrial-grade 99.9% isopropanol and other grades?
- How does obesity affect respiratory diseases/COVID-19?
- If the main reason why the common cold cannot be vaccinated is due to the fact it mutates, why are we not able to kill the viruses that cause them (rhinovirus etc.) in different forms?
- Why does massaging/pressing muscles relieve them?
| Posted: 20 Mar 2020 02:19 PM PDT |
| Posted: 21 Mar 2020 08:07 AM PDT |
| Posted: 21 Mar 2020 03:42 AM PDT |
| How are scientists getting estimates of 40-80% of populations that will contract the Coronavirus? Posted: 20 Mar 2020 01:41 PM PDT |
| In a life or death situation, could two patients be placed on a single ventilator COVID-19? Posted: 21 Mar 2020 01:53 AM PDT Based on my very limited familiarity with these devices, there's a high pressure supply and a low pressure return, each opened in an alternating manner. Could a single ventilator be retrofitted so that the high pressure and low pressure supplies teed off to two intubated patient?s Obviously, they'd have to be synchronized, and so patient-controlled ventilation would not be an option. Also, obviously the flow rates would need to be doubled, and I have no idea what those machines are capable of. But, in a life or death situation, could this be done? I found one paper on the subject: https://onlinelibrary.wiley.com/doi/epdf/10.1197/j.aem.2006.05.009 But I have no idea if it could be applied to COVID-19. EDIT: I found a video as well: https://www.youtube.com/watch?v=uClq978oohY [link] [comments]  |
| How does the initial viral load at exposure impact the immune system's response? Posted: 20 Mar 2020 09:34 PM PDT Imagine there is an exact copy of you, immune system and all. Both you and your clone get exposed to the virus once, the only difference being that you get exposed to 100 virions in the body while the clone gets 100,000 virions (These numbers are pretend, just meant to be relative to one another.) What would be the difference in outcome? Would one probably get sicker than the other? Would one gain a stronger immunity than the other afterwards? My understanding of immunology is kind of limited so bear with me. I believe what I'm getting at here is something similar to antibody-dependent enhancement, but more relating to the initial viral load at exposure. With a lower initial viral load, could the B-cells potentially quickly find an antibody that's effective enough to fight off only 100 virions, but not 100,000 (implying that a greater challenge with the same virus would blow through the relatively weak antibodies?). If you were later exposed to 100,000 of the same virions would the immune system try and find a new antibody that's effective enough to combat the higher viral load, or would it just keep trying to use the weaker antibody since it hasn't detected a new antigen? TL;DR - Basically what I'm asking is if the initial viral load impacts the time it takes for B cells to find an effective antibody, and whether that might in turn impact the robustness of the acquired immune response. This is not exactly a COVID-19 specific question, just hoping an immunologist happens to throw in their two cents. [link] [comments]  |
| Are plants also susceptible to catching viruses? Posted: 20 Mar 2020 09:34 PM PDT Do viruses only attack the animal kingdom? If plants are made of cells and viruses attack cells, can plants also catch plant-specific viruses? [link] [comments]  |
| Why doesn't the flu die out like other viral diseases like SARS or MERS? Posted: 20 Mar 2020 09:48 PM PDT .Why doesn't the flu die out and can't be contained like other viral diseases like SARS or MERS, why is it invincible? [link] [comments]  |
| What percentage of Covid19 cases that end up on a ventilator ultimately survive? Posted: 20 Mar 2020 03:09 PM PDT I assume anyone put on a ventilator is facing certain death without it. So far how many Covid19 patients are surviving after being put on a ventilator? How effective are they in this case? [link] [comments]  |
| Can we tell if any civilisations have been wiped out due to an epidemic by analysing their fossils? Posted: 20 Mar 2020 03:47 PM PDT |
| Posted: 20 Mar 2020 08:46 PM PDT |
| Why does earthquake seem to always propagate from 1 source point? Posted: 20 Mar 2020 08:07 PM PDT For a subduction-related event, shouldn't there be a series of tectonic stress build-up, considering a subduction zone is a long chain of tectonic plate border? [link] [comments]  |
| How does Shazam and other apps like Shazam work? Posted: 20 Mar 2020 02:41 PM PDT Even when there is plenty of background noise Shazam can still find the song. I was just curious on how these apps work [link] [comments]  |
| When developing a new drug how do they know what dose to give to test subjects without killing them? Posted: 20 Mar 2020 08:16 PM PDT |
| Why doesn't your body make antibodies/kill viruses during the incubation period? Posted: 20 Mar 2020 09:19 PM PDT Can your immune system not see that the viruses are there? Or it just ignores them until they replicate enough to start causing damage? [link] [comments]  |
| How do scientists determine the origin of a pandemic so specifically? Posted: 20 Mar 2020 12:40 PM PDT How are scientists able to determine that a particular pandemic came from a particular source like bird flu from birds or COVID from bats, especially so early on in the pandemic? It seems like everyone just magically, immediately knew that COVID came from a bat in Wuhan. I assume all bats don't carry the virus so what's the sequence of events that happens for people to figure out what species carried the virus initially and where in the world that initial transmission happened? [link] [comments]  |
| Why is the WIMP theory the most popular theory as to the makeup of dark matter? Posted: 20 Mar 2020 01:05 PM PDT I have read many primary articles regarding the hunt for dark matter, and they all extrapolate data using the WIMP theory. Why is this theory so much more prevalent than alternate theories like macros? [link] [comments]  |
| What's the difference between industrial-grade 99.9% isopropanol and other grades? Posted: 20 Mar 2020 01:39 PM PDT Coronavirus hoarding has made it very hard to find my go-to alcohol-based sanitizers for my kitchen and I am looking for non-bleach alternatives. I know pharmaceutical grade isopropanol production is carefully monitored and tested, but do the processes for different grades of such a high concentration of alcohol really differ greatly? Is the .01% of the formula really different between the two? Could 99.9% industrial grade isopropanol be diluted to 70% and used to clean surfaces in my kitchen, for example? If so would it be safe for skin contact while cleaning or would gloves be necessary? I tried researching this topic myself and couldn't find an answer about what if anything would make it unsafe in a diluted concentration. [link] [comments]  |
| How does obesity affect respiratory diseases/COVID-19? Posted: 20 Mar 2020 06:28 PM PDT In the two videos I've seen of Italian ICs, a disproportionate amount of patients looked overweight. It got me thinking, it makes sense that more weight on the chest affects the respiratory tract. In the light of the current crisis: are obese people significantly more at risk? [link] [comments]  |
| Posted: 20 Mar 2020 08:43 AM PDT Question might be a bit contradictory, but let me explain: There are currently flu vaccines for many types of flu that exist, and currently a vaccine for Coronavirus has been developed. However, many say that the main reason why we are not able to vaccinate against the common cold is due to the reason it mutates, and would make a vaccine pretty much useless. The cold must be able to mutate in only a finite amount of ways, so why is it not possible to kill the main viruses that cause them and put them in a vaccine? [link] [comments]  |
| Why does massaging/pressing muscles relieve them? Posted: 20 Mar 2020 05:36 AM PDT |
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