CIE IGCSE Biology: 复习笔记:3.1.4 Osmosis

CIE IGCSE Biology: 复习笔记:3.1.4 Osmosis

Osmosis

  • All cells are surrounded by a cell membrane which is partially permeable
  • Water can move in and out of cells by osmosis
  • Osmosis is the diffusion of water molecules from a dilute solution (high concentration of water) to a more concentrated solution (low concentration of water) across a partially permeable membrane
  • In doing this, water is moving down its concentration gradient
  • The cell membrane is partially permeable which means it allows small molecules (like water) through but not larger molecules (like solute molecules)

Osmosis-and-the-partially-permeable-membrane

Osmosis and the partially permeable membrane

转载自savemyexams

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