In a cell what separte's the inside from the outside?

Answer 1

when phospholipids are arranged in a way that polar heads can be closest to water molecules and the nonpolar molecues tails can be found away from the water molecules. when phospholipid molecules come toghether in this way a barrier is created that is polar at that surface and non polar in the middle. Water substances will not move easily through the plasma because they are stopped by the non polar middle. Therefore, the plasma membarane can separate the enovironmet insde the cell from the environment outside the cell.

Answer 2

The membrane that surrounds a cell is made up of small particles called phospholipids. These have a hydrophilic (attracted to water) head and tow hydrophobic (repelled by water) tails. Since the environment a cell is in is mostly made up of water these automatically arrange themselves to form a layer where the tails are on the inside and the heads form a watertight barrier on the outside. The inner side of this membrane is also like this due to the high concentration of water inside the cell.

Answer 3

The cell membrane or plasma membrane or plasmalemma.

Answer 4

Any cell. All cells have membranes that separate them from the outside world. A cell sans membrane isn't as much a "cell" as a "hopeless mess of protoplasm".

Answer 5

It is the cell membrane.