Save
...
Cell Membranes
Exchange across Cell Membranes
Diffusion
Save
Share
Learn
Content
Leaderboard
Learn
Created by
Daisy
Visit profile
Subdecks (1)
Facilitated Diffusion
BIOLOGY > 2 CELLS > Cell Membranes > Exchange across Cell Membranes > Diffusion
19 cards
Cards (26)
Is diffusion
active
or
passive
?
passive
what is the definition of
diffusion
?
The net movement of particles (molecules or
ions
) from an area of higher concentration to an area of
lower concentration
down a concentration gradient
Which ways will molecules
diffuse
?
both ways
,
BUT
the
net movement
will be to the
area
of
lower concentration.
This
continues
until
particles
are
evenly distributed
throughout the
liquid
or
gas
What is the
CONCENTRATION GRADIENT
?
The
path
from an
area
of
higher concentration
to an
area
of
lower concentration gradient. Particles diffuse DOWN
a
concentration gradient.
Diffusion
is a
PASSIVE PROCESS.
What does this mean?
No energy
is
needed
for it to
happen
What can
particles diffuse across
?
cell membranes
, as long as they can
move freely
through the
membrane
What is
simple diffusion
?
when
molecules diffuse directly
through a
cell membrane
See all 26 cards