Diffusion
A type of passive
transport that moves
molecules from
high to low
Passive Transport
Movement of molecules
from high to low & does
not require energy
Osmosis
A type of passive
transport that moves
water from high to low
Facilitated
Diffusion
A type of passive
transport that requires a
protein embedded in
membrane
Active Transport
Movement of molecules
from low to high &
requires energy (ATP)
Concentration
Gradient
A change in the density
(percentage) of molecules
across a distance
Cell Membrane
A balance of molecule
concentration inside vs.
outside the cell
Equilibrium
Phospholipid bilayer with
embedded proteins that
surrounds all cells and
controls what enters/leaves
the cell.