Recent comments in /f/explainlikeimfive

DavidRFZ t1_j6ctdoh wrote

So, are there parents on identical twins out there?

Is it obvious how to tell the two babies apart? Are birthmarks in different places easily visible?

I mean infants don’t do much for the first few months so I can imagine a case where they don’t bother trying to figure out which is which for a while. But I never hear a story like that. Parents are absolutely certain which kid came out first. How do they do it?

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mcchanical t1_j6ctb5o wrote

I get something like this occasionally but I have really bad eating habits and often it's in a morning after I've been drinking, so I always put it down to my body just craving easy nutrients and actual hydration. I find milk very addictive sometimes but I always have, it's just so easy to pound a carton of milkshake and feel satiated with a bit of fat, protein, water and sugar.

No visual issues yet but I will always keep advice like this in mind. I see it a lot on Reddit and occasionally I do wonder about the normality of my eating habits sometimes.

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DoctorWaluigiTime t1_j6ct6s8 wrote

It's okay to not drink water that long. Your body will inform you when you're thirsty. I suggest next few times you are thirsty you don't chug the whole bottle all in one go, however.

And yes, "you must have X amount of water a day" is bunk. Your body will not let you get into states of dehydration (which occurs long after "I haven't had a drink in six hours" -- you do that every night when you sleep, and you aren't in a state of dehydration when you wake up).

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bahji t1_j6csq7c wrote

I think it's incredible that the body can learn and adapt to your own routines like that. I do a daytime fast every year for three weeks, so i don't eat food or drink while the sun is up. Within just a couple days my body catches on and I end up needing to pee an hour before sunset everyday like clockwork. Like my body is like, "it's 5 O'Clock, the idiot is going to start drinking again, we can release the reserves." It's just wild.

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TinyDemon000 t1_j6csk1c wrote

At nursing school currently and just learning about the renal system so here we go:

Kidneys detect low rate of liquid passing through them > release 'renin' which causes our brains to activate thirst centre in the brain, telling us to drink more.

At the same, this renin turns into another hormone, which releases yet another hormone (ADH/Anti diuretic hormone) which causes kidney tubes to become more permeable to water, thus increasing our water reabsorption. It also causes yet a further hormone to release that causes sodium retention, because water follows sodium so this causes further water reabsorption from the kidneys.

This is why your pee gets darker as dehydration sets in, because the water is getting sucked back up.

If you were plenty hydrated, your body will dump excess water because this whole process isn't happening.

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AgentScreech t1_j6crng6 wrote

It's like if you stole a menu from a restaurant. You would know what it was supposed to make, but you don't have the kitchen or the cooks.

When you go to a website, you interact with the frontend (menu in this analogy). The "backend" is the thing that processes your request (kitchen) and returns the result to the frontend to be presented

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efvie t1_j6credv wrote

While the other answers are correct in that there is typically a 'backend' that you don't have direct access to and is actually responsible for at least putting together the content that is displayed on the page (the 'frontend'), I think it's equally important to understand that what you do see you have full access to* and can copy exactly.

For example, you could take this comment page, save it with all the content, images, and so on, and put it up for yourself. You could even have it update itself to a degree (although there are some ways that sites could try to protect against that.)

The reason this is important to know is that it limits the data you can make available on the frontend. The backend, for example, has access to all Reddit users — the frontend can't be given such access (beyond public information) because if it did, anyone accessing the page could see it. You also can't store 'secrets' like credentials to access services on the frontend directly, and so on and so on.

* There's again ways to protect against some access, mostly by making it very inconvenient, but ultimately for anything to appear on your screen it needs to be transmitted.

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