cell transport systems

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  • Created by: vanessa
  • Created on: 16-12-13 12:16
what is the definition of diffusion
the movement of molecules from high to low concentration
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four factors affecting diffusion?
distance, gradient, temperature, surface area
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where does diffusion take place / two examples
only liquids and gases (i.e. alveoli and villi)
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definition of osmosis?
movement of water from a high water potential to a low water potential
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what does osmosis need
semi-permeable membrane
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four names of osmosis in plant and animal cells
flacid, turgid, crenated and swell
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four experiments for osmosis
salty egg, potato and visking tube and the treakle
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how does water get from the roots into the rest of the plant
roots, across cortex, into the xylem
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what is the definition of active transport
process of molecules moving across a cell membrane from low concentration to high concentration
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what does active transport need?
input of energy
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what is two examples of active transport
nitrates in root cells and digestion of food
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Card 2

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four factors affecting diffusion?

Back

distance, gradient, temperature, surface area

Card 3

Front

where does diffusion take place / two examples

Back

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Card 4

Front

definition of osmosis?

Back

Preview of the front of card 4

Card 5

Front

what does osmosis need

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