We have around about three thousand milmals of sodium in our body at any one that's pretty much how we maintain it. The strongest regulation for this solute is going to be the kidney with an array of hormones. If you'de taken too much, in, like two to three times more than you should, thatmean we need to have some tight regulation on how to get rid of it. And so in i gotin balance and water balanceer regulated together. So we have to talk about them togetherye.