What would happen if you were given pure water in an IV?

The question is what would happen if you are given pure water in an IV. The answer is, the pure water will disrupt the osmotic balance of the body. Saline solutions are usually used in IV, this is because, there is a need to maintaint the osmotic pressure between the body cells and body fluids. Cell membranes are selectively permeable, infusing the body system with pure water will make pure water to rush into cells, dilute the contents and make the cells to swell up.