Answer:
The membrane is made up of a double layer of phospholipids, called the lipid bilayer. Scattered between these phospholipids are various other molecules such as protein channels, pumps, cholesterol, and carbohydrate chains.
It would effect the salt balance in the body because there would be more water than salt in each blood cell. Every blood cell has an amount of water and salt. Now if you drink enough water then you would get water poisoning which is when your blood cells have so much water that they start to burst! Which is cool, except for the part where you would also die...