They are positively charged so electrical signals are actually not created by long migrations of electrons, but by short diffusion of positive charges across membranes, that temporarily reverse local polarization. This depolarization triggers nearby regions to do the same, creating depolarization waves: https://en.wikipedia.org/wiki/Depolarization
It's very fascinating, also because controlling the cross membrane diffusion of ions allows for controlling the signals. Which is what neurotransmitters do
Tbf, in its current form chatgpt is already wiser than most politicians. Unfortunately, because of your last sentence, they will stay less wise that chatgpt
They don't donate electrons. When metallic sodium or potassium donate electrons they burn, explosively. It doesn't happen in our bodies. It happens by simple contact with water.
They are already in their ionic form in our body. They cross membranes as ions, creating a potential difference across the membranes. Allowing ions to diffuse along the gradient generates the electric signals of our brains, or triggers the muscle contraction, among other things
Sodium is also used for all the electrical activity of our body (such as thinking and moving and living...), and is fundamental in adsorption of nutritions in digestion. Sodium, potassium and calcium are so important that it is difficult to even list all processes they are involved.
When dissolved in water many atoms and molecules have some charge, that allows them to create relatively weak bonds with waters (therefore stay in solution).
The charge means that they have either more electrons than protons (negatively charged) or less (positively charged). These are called electrolytes because they can be "moved" in water and separated by applying an electrical field (electrolysis, this requires a different eli5, take it as it is).
Outside water these substances aggregate to form "salts".
Now, some of these charged elements are crucial for functioning of basic biological processes, such as thinking, muscle contraction (including heart), even sensing.
Unfortunately they are lost when sweating (they are dissolved in sweat). In a healthy diet, where you eat enough fruit and vegetables, this is not an issue. If you are doing intense exercise however, an additional dose of these substances might help. TBF I am not sure if it has ever been proved that it is necessary... But it might help.
As said, if your diet is good, you don't need them. If your diet is s*it you'll probably have other issues. If you have real issues your doctor will tell you how to address them.
Tl;dr: those drinks are marketing stuff. They might be beneficial only in case of intense physical exercise, not needed for daily life if you follow a healthy diet
Link is broken. What I am trying to say is that megafires are pretty much the norm in south of spain, Sicily, Sardinia, greece. They are endemic there. Rhese regions have always had to strictly control on the territory because of such fire. What is happening there is that ongoing economical crisis, that is getting worse, there is no money for such a strict territorial control. But those places were already a bbqs ready to light. Now governments are poorer to prevent and interviene properly.
The main problem of climate changes is that it is extending north the region where these fires happen. Up to places previously unheard such as switzerland! That is the real proof that something bad is going on.
In the past, in south of Italy only Sardinia Sicily and Calabria were BBQs in summer. Now even places northern than that have become at high risk.
Source: I grew up there, my family is from there, I still visit often and keep reading news
Yes and no. Installing last version of android on a pixel 4 is most likely absolutely fine. And keeping at least security support is likely not a big deal. 3 years of security update support it is clearly a finance department decision. Why 3, why not 3 and half? Why not 4?
Just because they need predictability in sales, and they attached the support to the "classical" number of years after which you'd like a customer to buy a new tech product. 3 years has always been a magic number for hardware companies, since forever
They are positively charged so electrical signals are actually not created by long migrations of electrons, but by short diffusion of positive charges across membranes, that temporarily reverse local polarization. This depolarization triggers nearby regions to do the same, creating depolarization waves: https://en.wikipedia.org/wiki/Depolarization
It's very fascinating, also because controlling the cross membrane diffusion of ions allows for controlling the signals. Which is what neurotransmitters do