口 Another classification u Passive transport Simple diffusion(简单扩散/单纯扩散 口 Filtration(滤过) 口 Facilitated diffusion(易化扩散) 口 Active transport 口 Active transport(主动转运) Pinocytosis/exocytosis(入胞/出胞)Another classification Passive transport Simple diffusion(简单扩散/单纯扩散) Filtration(滤过) Facilitated diffusion(易化扩散) Active transport Active transport (主动转运) Pinocytosis/exocytosis(入胞/出胞)