Save
...
Cell Membranes RG
Exchange across membranes
Osmosis
Save
Share
Learn
Content
Leaderboard
Learn
Created by
Daisy
Visit profile
Subdecks (3)
Potato cells
BIOLOGY > 2 CELLS > Cell Membranes RG > Exchange across membranes > Osmosis
7 cards
Scale factor
BIOLOGY > 2 CELLS > Cell Membranes RG > Exchange across membranes > Osmosis
2 cards
Serial Dilutions
BIOLOGY > 2 CELLS > Cell Membranes RG > Exchange across membranes > Osmosis
3 cards
Cards (22)
Osmosis =?
The
diffusion
of
water molecules
across a
partially permeable membrane
from an area of
higher WATER POTENTIAL
to an area of
lower water potential
What does an area of higher water potential have?
Higher
concentration of
water
molecule
What does an area of
lower water potential
have?
Lower concentration
of
water molecules
What is water potential?
The potential of
water
molecules to
diffuse out
of or
into
a
solution
What do all solutions have?
A
lower water potential
than
pure water
When are two solutions said to be isotonic?
If
2
solutions have the
same water potential
What does the rate of osmosis depend on?
Water potential gradient
Thickness of exchange surface
Surface area of exchange surface
What happens as osmosis takes place?
the difference in
water potential
on either side of the membrane
decreases
, so the
rate
of
osmosis levels
off over
time.
How does the rate of
osmosis
depend on the thickness of the
exchange surface
?
Thinner exchange surface
=
faster rate
of
osmosis
How does the rate of osmosis depend on the surface area of the exchange surface?
The
larger
the surface area =
faster
rate of osmosis
See all 22 cards