Describe the transport mechanisms across the membrane

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  • Created by: Rosie
  • Created on: 05-05-14 14:59
Diffusion
Movement of molecules/ions from high to low concentration down a concentration gradient, across a membrane
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Facilitated diffusion
movement of molecules /ions from high to low concetration down a gradient, through protein channels
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Osmosis
movement of water from a region of high water potential down a water potential gradient.
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Active transport
movement of molecules/ions from low to high concentration against a concentration gradient through protein carriers: requires energy from ATP
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Cytosis (Endo & Exo)
engulfing by membrane to form a vesicle (endocytosis) or vesicle merging with membrane (exocytosis)
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Card 2

Front

Facilitated diffusion

Back

movement of molecules /ions from high to low concetration down a gradient, through protein channels

Card 3

Front

Osmosis

Back

Preview of the front of card 3

Card 4

Front

Active transport

Back

Preview of the front of card 4

Card 5

Front

Cytosis (Endo & Exo)

Back

Preview of the front of card 5

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