As the topography of live cells is measurable ... is homogenous or that movement of molecules in the membrane occurs only by simple diffusion, we do suggest that either SPT be performed in ...

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 an area where they are at a low ...

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 ...