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Year 9 Bio
Diffusion
Osmosis
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Scarlett M
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Cards (8)
Osmosis
The NET movement of
water
across a partially permeable membrane from an area of higher water concentration to an area of
lower
water concentration
Isotonic
Two solutions that have the same
water
concentration
Cells placed in:
Pure water
burst
concentrated sugar solution shrink/becomes flaccid
Isotonic solution stay the same
Plant
cell
in
pure water
Swell
Plant cells do not
burst
when placed in
pure water
because the cell wall is strong enough to stop it bursting
Flaccid
/
Plasmolysed
A cell in which the cytoplasm
shrinks
away from the cell
wall
completely
Plant cell placed in:
Equal
sugar concentration to cell cytoplasm start to
pull
from
cell wall
Weaker
sugar solution than cell cytoplasm
shrivels
Stronger
sugar solution than cell cytoplasm
swells
Plants without
woody
tissue wilt if they are not given enough
water
because the stem cells go flaccid