Hyper netremia can be caused by water loss or non renal causes. Non renal cause means you're not actually getting salt put out in your uron. You have equivalent sodium and water loss, which reduces the volume as well. But you can also crave salt. Your brain's pretty good telling you get some salt into your body, and then the water goes in. So that's what happens when we are dehydrated, right? 80 h thirst and aldostrone. Ok i'm sorry, mat, but i thought would say it will set up the rest of thes.