Salt does not cause high blood pressure. If you have it in your immediate family, however, it is smart to try to limit it so that if you do develop high blood pressure, it won't be so hard to kick!
Actually, yeah, there is a balance of potassium (within the cell) and sodium (outside the cell). Your body tries very hard to maintain an equilibrium. When you ingest a large amount of salt (say, a big pizza and wing dinner), if you have not already drank tons of H2O, you will get thirsty. Haven't you ever been awakened in the night super thirsty after a really high salt meal? This is your body attempting to maintain that equilibrium. So, if you do tend to eat a lot of salt, yes, it is very beneficial that you drink tons of water. Drinking a lot of water also helps with bloat and water retention. You could eat less salt if your diet is VERY salty, but be careful there too, as I know they talk of a condition caused by too much water and not enough elecrolytes (as in marathon runners). You can actually make yourself sick, but I think it is a hard thing to do. You probably already drink lots of H2O without even trying, so who cares, right?
BIO 181 was great for all that cell information. Taught me that dehydration is the #1 reason of fatigue in America simply because your body's cells cannot function. Actually, they wither-lose their round shape- and it is harder for them to accept (or produce) ATP, cellular energy. If you ever get a chance to read up on it, it is really fascinating. This is when my quest to drink over a gallon of water a day began. And I still do!!
Janice