PASSIVE
ACTIVE
PASSIVE
ACTIVE
PASSIVE
ACTIVE
PASSIVE
ACTIVE
DIFFUSION
FACILITATED DIFFUSION
CARRIER PROTEINS
FACILITATED DIFFUSION
CHANNEL PROTEINS
FACILITATED DIFFUSION
AQUAPORINS (OSMOSIS)
Na+ - K+ PUMP
PROTON PUMP
COTRANSPORT
EXOCYTOSIS
ENDOCYTOSIS
ENDOCYTOSIS
(Phagocytosis)
RECEPTOR MEDIATED
ENDOCYTOSIS
(Pinocytosis)
MEMBRANE
MEMBRANE
PROTEIN
PROTEIN
MEMBRANE
MEMBRANE
PROTEIN
PROTEIN
MEMBRANE
MEMBRANE
PROTEIN
PROTEIN
MEMBRANE
MEMBRANE
PROTEIN
PROTEIN
MEMBRANE
MEMBRANE
PROTEIN
PROTEIN
VESICLE
VESICLE
VESICLE
VESICLE
VESICLE
VESICLE
VESICLE
VESICLE
VESICLE
VESICLE
VESICLE
VESICLE
VESICLE
VESICLE
NO HELP
NO HELP
NO HELP
NO HELP
NO HELP
NO HELP
NO HELP
NO HELP
NO HELP
NO HELP
NO HELP
NO HELP
NO HELP
NO HELP
Moves small, uncharged, nonpolar
molecules across membranes
from [HIGHER]→[LOWER]
EX: O2 from lungs to blood;
CO2 from blood to lungs
Moves glucose into cells with
the use of proteins that change
conformation & flip to other side
Moves water molecules across
cell membranes from
[HIGHER]→[LOWER]
Moves ions such as Ca++, Cl-,
Na+, K+ passively from
[HIGHER]→[LOWER]
Electrogenic pump that moves 3 Na+
out of cells and 2 K+ into cells
creating an electrochemical gradient
[LOWER]→[HIGHER]
Cells engulf solutes or fluids
Electrogenic pump that moves H+ across
a membrane to create an electrochemical gradient
[LOWER]→[HIGHER]
EX: Make lysosomal interior acidic
Linked to ATP formation in photosynthesis/respiration
Moves a molecule into/out of cells
by coupling its transport to the movement
of another down its gradient
EX: Glucose linked to movement of H+
Cells engulf large molecules or
whole cells
EX: White blood cells/bacteria
Specific molecules (ligands) are taken into cells
after binding to receptors on the cell surface
EX: cholesterol uptake
Transport vesicles fuse to cell membranes
and release their contents outside cell
EX: used by Golgi