B3 - Movement of Molecules In and Out of Cells

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  • Created by: 11jc01
  • Created on: 31-03-16 16:43
Osmosis
The movement of water through a partially permeable membrane into a solution with low water concentration
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Concentration gradient
A change in the concentration of a substance from one region to another
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Active transport
The movement of substances against the concentration gradient; requires energy
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Specialised
Adapted from particulate purpose
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Surface area
The external area of the living thing
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Villi
Projections that stick out from the walls of the small intestine; each villus contains a network of blood capillaries for absorbing soluble food
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Alveoli
Air sacs in the lungs; oxygen diffuses out of them and carbon dioxide diffuses into them
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Ventilation
The process of breathing in and out
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Stomata
Openings /pores in leaves
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Transpiration
The movement of water through a plant from root to leaf
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Guard cells
Pairs of sausage shaped plant cells that open and close to allow carbon dioxide into the leaf and water and oxygen out (through the stomata)
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Other cards in this set

Card 2

Front

A change in the concentration of a substance from one region to another

Back

Concentration gradient

Card 3

Front

The movement of substances against the concentration gradient; requires energy

Back

Preview of the back of card 3

Card 4

Front

Adapted from particulate purpose

Back

Preview of the back of card 4

Card 5

Front

The external area of the living thing

Back

Preview of the back of card 5
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