Transport across the cell membrane (Diffusion, Osmosis, Facilitated Diffusion, Active Transport).
How do substances (ions, proteins, ligands etc. etc.) cross from one side of the membrane to another?© SolutionLibrary Inc. solutionlibary.com 9836dcf9d7 https://solutionlibrary.com/biology/human-biology/transport-across-the-cell-membrane-diffusion-osmosis-facilitated-diffusion-active-transport-1j5
...e a difference because it serves as a barrier to separate and define the intracellular (inside cell) and extracellular (outside cell) space. Separating the intra- and extracellular space is also a core component in the definitions of life.
Diffusion - This method of moving substances utilizes potential energy stored in a gradient. Dissolved particles will want to move down their concentration gradient (move from a region of higher concentration to lower). If free to do so without hindrance it is called SIMPLE DIFFUSION.
Osmosis - This ONLY occurs for WATER. It is an example of simple diffusion. Water will move from a region of lower solute concentration (or higher water concentration) to a region of higher solute concentration (or lower water concentration). So next time someone tells you that they ...