movement across p.m

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  • Created by: Angelique
  • Created on: 18-12-12 08:27

movement across p.m

diffusion:

  • down its conc gradient, high to low conc.
  • doent need energy.

osmosis:

  • diffusion of water, from a more dilute solution to a more conc solution.
  • isotonic = w.p to a cell = no diffusion of water
  • hypertonic - w.p then a cell = water out of cell
  • hypotonic + w.p then a cell = water into cell

w.p:

  • the effective conc of of free water.
  • water always falls from high to low w.p
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