関連ワード:  what molecules need simple diffusion    what molecules need facilitated diffusion    what molecules require facilitated diffusion    which molecules need facilitated diffusion to move across the plasma membrane    which molecules require facilitated diffusion explain why    what molecules simple diffusion    what type of molecules need facilitated diffusion to get into the cell    what molecules need to use facilitated diffusion    what molecules use simple diffusion    what type of molecules use simple diffusion