How fast do liquids flow from the stomach into the small intestine? |
- How fast do liquids flow from the stomach into the small intestine?
- Does altitude make a difference during earthquakes?
- Baby birds are helpless and mostly drably coloured to blend in. However, chicks and ducklings are walking yellow highlighters. Is there some advantage to this colouration?
- If someone is born extremly premature (week 25) what do they "miss out" in comparison with babies that are born in the intended timeframe? Is there going to be consequences in their adult life and/or mental health?
- Is the rate of acceleration of the expansion of the universe changing? i.e., does the universe expansion have a non-zero "jerk"?
- Does carbonated distilled water have a lower surface tension than distilled water with no gas component?
- Why do rocket ships start to roll when they are in the atmosphere instead of rolling in space?
- Sneaky Freaky Chickenpox. How?
- How does raw silicon naturally form and will we run out of (Raw) silicon?
- How has the 21% oxygen on earth been preserved for millions of years?
- (resting membrane potential) Why does the Na+/K+ pump move Na+ and K+ against their concentration gradients? Why is 3 Na+ out and 2 K+ in?
- In a mouth swab drug test, what part of the saliva is being examined for the drug?
- How do eels reproduce?
| How fast do liquids flow from the stomach into the small intestine? Posted: 06 Mar 2021 12:04 PM PST I was drinking water and I started to think about if the water was draining into my intestine as fast I was drinking it. [link] [comments]  |
| Does altitude make a difference during earthquakes? Posted: 07 Mar 2021 03:58 AM PST Let's assume the source of the earthquake is perpendicular to your position and at a fixed depth based on sea level. Would you or buildings be less effected from the quake in Nepal (lets say 4000-5000 km above sea level) than beeing on german plains (at maybe 200m)? If so, how much/would it be significant? I guess my question boils down to how much energy the waves lose while traveling through the rocks. As i understand, they don't have much room to 'soothe' before reaching the surface. Thank you. Furthermore, in theory, would it make sense driving up a mountain if an earthquake warning was announced (which can be impossible to predict in most cases, i know). [link] [comments]  |
| Posted: 06 Mar 2021 04:46 AM PST |
| Posted: 06 Mar 2021 10:49 AM PST |
| Posted: 06 Mar 2021 10:33 AM PST This question occurred to me because I often think about how science tells us that based on the most recent evidence, we think the expansion of the universe is accelerating. I just find it fascinating to imagine the heat death of the universe and such. But if the acceleration was constant or changing would have a significant impact on if we think a big "Crunch" is ever possible, or if the fate of the universe might be more complicated then a long slow heat death. [link] [comments]  |
| Posted: 06 Mar 2021 09:25 AM PST |
| Why do rocket ships start to roll when they are in the atmosphere instead of rolling in space? Posted: 06 Mar 2021 09:19 AM PST Why do rockets not roll when they are out of the atmosphere? To clarify my question, why don't they fly straight up and out of the atmosphere, then turn 90° and use the engines to propel themselves into orbit? It seems to me like the rocket would spend less time in the atmosphere where there is air resistance. [link] [comments]  |
| Sneaky Freaky Chickenpox. How? Posted: 06 Mar 2021 09:32 AM PST Unattenuated chickenpox goes into hiding and manifests as shingles eventually. Why did the immune system not cure it? [link] [comments]  |
| How does raw silicon naturally form and will we run out of (Raw) silicon? Posted: 06 Mar 2021 09:30 AM PST I was looking at some articles and I saw that silicon forms from Quartz, and quartz forms from volcanoes. Since volcanoes also form naturally does this mean there's a loop? Will we ever run out of raw silicon? Would it just keep forming back if we mine all of these silicates on earth? Granted if we did mine all silicates it would take a while for volcanoes to form and create quartz and stuff. [link] [comments]  |
| How has the 21% oxygen on earth been preserved for millions of years? Posted: 05 Mar 2021 01:38 PM PST Is it known how it is possible that earth's oxygen has been steady at around 20% or 21% for the past couple million years? Especially because the earth's oxygen levels have been fluctuating between 10% and 31% over the spacy of hundreds of million of years? Is it because the amount of oxygen made is exactly the same as the amount of oxygen used because I find it hard to believe that the amount of oxygen produced by plants is exactly the same as the need for oxygen. Because any spillover would also build up over time right? I guess I'm just curious what the main factors and variables are terms of influencing and correcting the ratio of oxygen on earth to be so steady. [link] [comments]  |
| Posted: 05 Mar 2021 12:46 PM PST Hello all, I'm having a hard time trying to make sense of the mechanism of the Na+/K+ pump. So what I know is that there is a higher concentration of K+ in the interior of cell and oppositely the interior has a a lower concentration of Na+. So naturally, K+ ion will want to move outside of the cell and Na+ ions will want to move inside. However, the Na+/K+ pump moves Na+ and K+ ions against their "wills". I'm vaguely aware that this is an active transport meaning ATP is required to carry it out but I'm not sure why such energy must be used for this. Why not just let them move according to their concentration gradients? I was trying to explain this to myself and I thought about the fact that the interior of cell is electrically negative as compared to the extracellular fluid. This one I'm not sure what it means. Does being electrically negative mean that in total there are move negative charges inside the cell than outside? If so, cell would try to direct more positive charges towards the inside. That might be why 2 K+ ions are moved in. However, it doesn't make sense as 3 K+ ions are pumped out. So in total there's a net loss of positive ions inside the cell? Also Does being electrically negative mean that in total there are move negative charges inside the cell than outside? I'm very confused by this. In summary, I would like to ask 3 questions
I am deeply appreciative of all the helps I can get. I've been tossing and turning all night trying to make sense of this but to no avail. Also I've just started learning about membranes and action potentials a few days ago so simple explanations are much encouraged. Thank you so much! [link] [comments]  |
| In a mouth swab drug test, what part of the saliva is being examined for the drug? Posted: 05 Mar 2021 01:02 PM PST |
| Posted: 05 Mar 2021 12:35 PM PST |
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