How does anesthesia "tax the body"? |
- How does anesthesia "tax the body"?
- Why don't steel bridges e.g. the Sydney Harbour Bridge, suffer metal fatigue?
- Can each ring of a tree be carbon dated to its respective year?
- Do people with Face Blindless still experience the uncanny valley effect from looking at messed-up Faces?
- How do subterranean animals cope without sunlight?
- Why is there a desert on the Arabian peninsula?
- Can someone explain how Thrombopoiesis Works, especially in terms of how Megakaryocytes insert mRNA and translational machinery inside platelets?
- Do bears lose muscle/strength while hibernating?
- Why does coffee work as a laxative?
- Does particle handedness affect matter-antimatter annihilation?
- What makes a Portugese man o' war different from other animals?
- Does every star system have its own habitable zones?
- What is the physiological mechanism through which fatigue/tiredness can cause visual/auditory anomalies?
- Why does cAMP not interfere with other cell signalling responses?
- How are biological substrates (tRNAs, free nucleic acids, etc.) localised for use in building larger molecular structures?
- How is the rate of infection calculated in diseases like Mers, Sars and Covid-19?
- What happens to matter when disolved in acid?
- What happens in our brain that causes up to wake up naturally?
- What is the mechanism for severe tachycardia (>180 bpm) in DKA?
- Why are inactivated vaccines generally less effective than live-attenuated vaccines?
- Most eggs we buy are unfertilized, i.e. they will not hatch chicken. Can hens distinguish between fertilized and un fertilized eggs? Or do they sit on either type and get disappointed after sometime.
| How does anesthesia "tax the body"? Posted: 25 Mar 2022 04:21 PM PDT I recently had surgery and the doctor recommended spinal painkiller instead of general anesthesia due to the latter being very "taxing on the body", and that it takes a while to recover from it. Why is this the case? [link] [comments] |
| Why don't steel bridges e.g. the Sydney Harbour Bridge, suffer metal fatigue? Posted: 24 Mar 2022 08:28 PM PDT Millions of tons of moving, vibrating trains, trucks, busses and cars every day. Forces of wind and rain. Fierce heat and cold yet no-one ever talks about fatigue in the steel. Especially in cables like Brooklyn bridge or the Golden Gate Bridge? [link] [comments] |
| Can each ring of a tree be carbon dated to its respective year? Posted: 25 Mar 2022 08:20 AM PDT If we carbon date a piece of wood, is it an approximation of all the years or a specific ring? Do the inside layers of a tree regenerate along the way that the whole tree is the same newness as the most recent ring? [link] [comments] |
| Posted: 24 Mar 2022 05:48 AM PDT So, most people are creeped out by human faces that have been altered or are just a bit 'off", such as the infamous "Ever Dream This Man?" face, or the many distorted faces featured in the "Mandela Catalogue" Youtube series, because of the Uncanny Valley effect. But when it comes to people with Prosopagnosia (face blindness), does that instinctive revulsion still happen? I mean, the reason we find altered faces creepy is because our brains are hard-wired to recognize faces, so something that strongly resembles a face but is unnatural in some way confuses our brain. But if someone who literally can't recognize a face as a face looks at something like that, would they still be creeped out? EDIT: Well, after reading some comments from actual faceblind people, I have learned I have been gravely misinformed about the nature of face blindness. Still, this is all very fascinating. [link] [comments] |
| How do subterranean animals cope without sunlight? Posted: 25 Mar 2022 04:23 PM PDT Humans and many other species depend on sunlight for vitamin-D, regulating blood sugar and serotonin. Prolonged lack of sun-exposure will lead to many health issues and eventual death. But there are lots of animals that get little to no sunlight, for example moles and naked mole-rats that live most of their lives deep underground with no ill effect. What adaptions do subterranean animals have that allows them to live without light? [link] [comments] |
| Why is there a desert on the Arabian peninsula? Posted: 24 Mar 2022 06:29 PM PDT The Arabian peninsula is surrounded on water on 3 sides and has mountain ranges that could catch precipitation coming from the red sea, Persian gulf and Arabian sea. I know that its an extension of the Sahara but shouldn't there be areas on the peninsula that do have good amounts of precipitation? [link] [comments] |
| Posted: 25 Mar 2022 02:48 PM PDT I am a highschool student researching vestigial mRNA inside platelets, and I could use some help with understanding this topic. If you have any articles that you think I should check out as well, that would be much appreciated. Thank you! [link] [comments] |
| Do bears lose muscle/strength while hibernating? Posted: 24 Mar 2022 09:08 AM PDT I'm just thinking how human muscles degrade after a while of not using them. For example, if a person is bed-bound for a while or even astronauts coming back home from the ISS, they need some sort of rehab to gain strength back. Does that happen to bears? [link] [comments] |
| Why does coffee work as a laxative? Posted: 24 Mar 2022 06:51 AM PDT |
| Does particle handedness affect matter-antimatter annihilation? Posted: 24 Mar 2022 08:21 AM PDT For example, is there any theoretical difference between a left-handed electron interacting with a right-handed antielectron and a left-handed electron interacting with a left-handed antielectron? [link] [comments] |
| What makes a Portugese man o' war different from other animals? Posted: 24 Mar 2022 06:29 AM PDT According to wikipedia, a Portugese man o' war (and other Siphonophorae) isn't a single organism per-se, but actually a colony of zooids all working together, which can't exist separately. But how is this different to 'regular' animals? Animals are also composed of multiple components (organs) made of cells, which also can't exist separately. So how are man o' wars and zooids different to other animals? [link] [comments] |
| Does every star system have its own habitable zones? Posted: 24 Mar 2022 08:39 AM PDT Just curious, incase we were to become Interstellar travellers, can we just insert space-stations in an orbit around stars where the temperature, gravity etc are optimal [link] [comments] |
| Posted: 24 Mar 2022 07:36 AM PDT I'm a very fatigued medical student studying not-neuro right now, but I always notice these little visual anomalies when I am very tired. Like when I stare at words on a computer screen, they will start to ripple, or I'll see color start to materialize on a white screen. (I know I need sleep, thank you) I'm curious how fatigue produces this. I have heard that extreme exhaustion will cause visual/auditory hallucinations, but never figured out the mechanism. What kind of "wires" are crossing to form this? Is it some sort of 5-HT mediated supplementary pathway that is altering the cortical processing of cranial nerve sensory inputs? That's my first guess. Thank you for your help! I'm outsourcing help so I don't end up going down another google scholar rabbit hole the day before a final... [link] [comments] |
| Why does cAMP not interfere with other cell signalling responses? Posted: 24 Mar 2022 11:40 AM PDT From my A-level understanding is that a hormone will bind to a receptor, the receptor will release cAMP or another second messenger and that will start an enzyme cascade. But if this (or any other second messenger) is being released into the cell, how does it only activate the PKA for this response? If this is a common second messenger and multiple hormone receptors are releasing this generic messenger molecule into the cell why does it not travel to the start of a different enzyme cascade and trigger that response? [link] [comments] |
| Posted: 23 Mar 2022 10:35 PM PDT To give a specific example, I was watching a video of an animation of DNA replication (https://www.youtube.com/watch?v=7Hk9jct2ozY&list=PLD0444BD542B4D7D9&ab_channel=WEHImovies). How are the free nucleic acids necessary to build the DNA strands localised to the replication site? In general, this is something that has always confused me about biology - it seems unfathomable that the "ingredients" necessary for these complex cellular processes are so readily available in such a huge and "dumb" cell - another example being tRNA for protein synthesis. [link] [comments] |
| How is the rate of infection calculated in diseases like Mers, Sars and Covid-19? Posted: 24 Mar 2022 04:25 AM PDT |
| What happens to matter when disolved in acid? Posted: 24 Mar 2022 03:56 AM PDT On a molecular level, do atoms just cease to exist? Are they added to the acid? What happens? [link] [comments] |
| What happens in our brain that causes up to wake up naturally? Posted: 23 Mar 2022 12:45 PM PDT Inspired by my napping toddler. I am always doing mental calculations about how much is "enough" sleep. Obviously it seems like a good gauge of "enough" is if she wakes up naturally by herself. But of course she sometimes wakes up naturally when it's clear that she is still tired. What is the trigger in our brain that wakes us up in the absence of external noise, light, etc.? [link] [comments] |
| What is the mechanism for severe tachycardia (>180 bpm) in DKA? Posted: 24 Mar 2022 09:53 AM PDT Would a rate this high only result from a reentrant rhythm? Or is it a sinus tachycardia from a combination of metabolic demand, dehydration, and catecholamine release? How high can the SA node actually pace? [link] [comments] |
| Why are inactivated vaccines generally less effective than live-attenuated vaccines? Posted: 23 Mar 2022 07:57 PM PDT I would think that both forms of the vaccine would display the same antigens on the surface, so what could make live-attenuated vaccines much more effective? [link] [comments] |
| Posted: 23 Mar 2022 09:05 AM PDT Most eggs we buy are unfertilized, i.e. they will not hatch chicken. Can hens distinguish between fertilized and un fertilized eggs? Or do they sit on either type and get disappointed after sometime. [link] [comments] |
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