This does not require a supply of energy because diffusion is a spontaneous process. This occurs when molecules are moved across the cell membrane from ... and potassium into the cells.

Cell membranes protect and organize cells ... Many of these proteins are embedded into the membrane and stick out on both sides; these are called transmembrane proteins. The portions of these ...

Diffusion is the movement of particles from ... and is one of the ways substances can move across the cell membrane, into or out of the cell. Products of digestion, dissolved in water, can pass ...

Early experiments, often by physicists, led to the understanding that the cell membrane was lipid in nature ... Second, we must remember that diffusion is one of the fundamental processes that ...

A new study shows how an anticancer drug triggers an "outside in" signal that gets it sucked into a cancer cell. The work, ...