生物 求高人解答 緊急!!!

Is it diffusion or osmosis?

Diffusion = the net movement of a substance (e.g.atom,molecule) from a region of high concentration to a region of low concentration

Osmosis= the net movement of water molecules from higher water potential to lower water potential across a DIFFERENTIALLY PERMEABLE MEMBRANE !!

2014-08-11 22:05:43 補充：
Yes.
Osmosis= the net movement of water molecules from higher water potential to lower water potential across a differentially permeable membrane

應該先分成擴散和主動運輸，擴散再分成簡單擴散和促進性擴散。滲透只是一種特殊的擴散。