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9 Cards in this Set

  • Front
  • Back


dynamic equillibrium between independent elements

function of cell membrane

allows selected substances to move through

keeps important stuff in, bad stuff out

site of biochemical reaction

mechanical support


passive movement of water molecules across a semi permeable membrane from a region of low solute concentration to a region of high solute concentration


passive movement of particles from a region of high concentration to place of low concentration

compare and contrast osmosis and diffusion

diffusion is high to low concentration gradient, osmosis is low solute concentrate to high solute concentrate

diffusion does not require water, osmosis does

what is active transport

active transport requires energy and transport proteins

what is facilitated diffusion

Large molecules and ions might be unable to pass through membrane because of the tails of the phospholipid layer.

Proteins can faciiliate movement through membrane. this happens through carrier protein channels

example of diffusion

perfume diffuses into air

tea bag

food colouring

example of osmosis

Dehydrated food becomes hydrated when submersed in water

Fingers prune when been in water too long because the water outside the body is higher solute than insidee