3 ms·
Yup, similar to frostbite. Normal skin temp is around 86°F. as it is cooled, it goes from cool to cold sensation, to very painful at around 55°F. Below that,
by toss1 4y ago
Yup, similar to frostbite. Normal skin temp is around 86°F. as it is cooled, it goes from cool to cold sensation, to very painful at around 55°F. Below that, you don't feel anything as it continues to cool to the point where it freezes solid (which wouldn't be a problem if the freeze-thaw cycle didn't create so many little spiny ice structures that break the cell walls; a type of frog has 'anti-freeze' in it's makeup so it can freeze and re-thaw). So, when your skin stops being painful, that's when you really need to warm it up NOW.
- jefftk 4y ago> a type of frog has 'anti-freeze' in it's makeup so it can freeze and re-thaw Nit: it can't actually recover from freezing solid. It just has lowered the freezing point of the remaining liquid to below the temperatures it's going to encounter.
- toss1 4y agoThanks, you provoked me to look it up in more detail, and we're both oversimplifying, and it's even wilder than I thought. From [0]: >> On an organismal level, they are completely frozen to death — their heart stops beating and breathing ceases. Image via Facebook >> The frog’s death-defying trick actually comes down to one simple factor: nucleating proteins. When the frog’s skin begins to freeze, these proteins cause the water within the frog’s blood to freeze first, which in turn serves as a vacuum for most of the water out of the cells. Simultaneously, their bodies pump out large amounts of glucose to serve as stuffing material, which prevents the cells from collapsing. >> Essentially, frogs fill their bodies full of sugar to keep themselves alive through winter. When warm temperatures melt the snow around their hibernacula, frogs slowly thaw back to life. Water melts and returns to the bloodstream, begins circulating, and restarts their heart and breathing. Within an hour or so the frog returns to normal life, completely unscathed. Just wild! [0] https://roaring.earth/frogs-literally-freeze-during-winter-and-thaw-back-to-life-in-spring/ https://roaring.earth/frogs-literally-freeze-during-winter-a...
- jefftk 4y agoIt's definitely wild! But "completely frozen" isn't quite right: if you slowly lowered the temperature of a "frozen" frog enough the tiny bit of water still within the cells would freeze, and the frog would die.
- pantalaimon 4y agoThey also froze hamsters and revived them with a microwave https://youtu.be/2tdiKTSdE9Y https://youtu.be/2tdiKTSdE9Y
- brutusborn 4y agoI noticed a similar effect getting 3rd degree burns. It was very painful for a moment, then much less painful as the nerves burnt away.