Transport across cell membranes

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  • Created by: Kadejha
  • Created on: 29-12-13 00:19
Why is diffusion passive?
because it requires no energy (moves along a concentration gradient)
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why is facilitated difusion different to regular diffusion?
because although it is also passive, it uses proteins to move substances across the cell membrane
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what is one example of facilitated diffusion?
glucose transport
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there are two ways to move material across a cell membrane; what are they?
Endocytosis and Exocytosis
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Endocytosis is...
moving material inside the cell membrane
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Exocytosis is...
the release of a large amount of material from the cell and outside the membrane
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a hypertonic solution has...
a higher solute concentration, so for example, if a red blood cell was in a hypertonic solution, the water would move move out of the red blood cell and into the concentration
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an isotonic solution is...
a solution at an equilibrium. e.g. if a red blood cell was in an isotonic solution, it would neither loose or take in water
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a hypotonic solution has...
a lower solute concentration, so if a red blood cell was placed in a hypotonic solution, water would move into the red blood cell
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Other cards in this set

Card 2

Front

why is facilitated difusion different to regular diffusion?

Back

because although it is also passive, it uses proteins to move substances across the cell membrane

Card 3

Front

what is one example of facilitated diffusion?

Back

Preview of the front of card 3

Card 4

Front

there are two ways to move material across a cell membrane; what are they?

Back

Preview of the front of card 4

Card 5

Front

Endocytosis is...

Back

Preview of the front of card 5
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