Beginning of Essay
Osmosis is the diffusion of water molecules across a differentially permeable membrane from a region where water molecules are more concentrated to one where they are less concentrated. The transport of water is simple the cell being selectively permeable will al ....

Middle of Essay
.... a muscle cell wants potassium and wants to get rid of a sodium, the cell releases ATP to the pump proteins which results in the cell ejecting the sodium ion and at the same time another receptor cell accepts a potassium which is then released into the cell and the process is repeated until the cell is finished. c.Facilitated Transport In facilitated transport a molecule that cannot normally pass through into a cell use a carrier protein to gain access and exit. Basically this allows a cell to acquire molecules that cannot get through it¹s selectively permeable membrane. For example a plant cell requires glucose and the glucose will not ....