>>13052917>Could someone explain to a midwit how exactly the body surveys all of its cells and punishes deviation?It was a metaphor; what I was referring to is how the innate immune system works; which is that almost every cell in your body expresses a special marker on its surface called MHC I, which NK cells, constantly circulating in the blood, are 'scanning' for, and if they encounter a cell with a missing or an abnormal MHC I(which is what happens in cancer or viral infections), they no longer recognise it as part of your body, and kill it
>if it is a good idea for the brain in some conditions to sacrifice everything but the brain heart and lungs? That's just part of the automatic response to hemodynamic shock (compromised circulation either due to blood loss or other causes) - the blood vessels in your periphery(arms, legs) and internal organs like the liver or GI tract constrict, diverting whatever blood possible to the vital organs. It serves a purpose in 'mild' cases, allowing time for the issue to be fixed and possible recovery(because most tissues can handle a good time with no blood supply, up to an hour for the skin and muscle of your limbs, while neurons die after only 5-10 minutes; not to mention that most other tissues can recover and regenerate, whereas dead brain tissue stays dead); but obviously in terminal cases it's just desperate and pointless
