View
216
Download
0
Category
Preview:
Citation preview
Membrane Transport
Lion Den Slide CollectionBy Kevin Patton
User ManualClick each slide to advance it
Passive Transport
Requires no metabolic energy provided by the cell
Solute
Solvent
HIGH concentration
LOW concentration
Concentration gradientSAMEconcentration
SAMEconcentration
Equilibrium
Solution
NET movement
Diffusion reduces or eliminates a
concentration gradientCollisions of particles
spread the particles out
HIGH concentration
LOW concentration
Concentration gradient
Simple diffusionis passive movement of
solutes through a membrane
SAMEconcentration
SAMEconcentration
Equilibrium
NET movement
Net diffusion down the concentration gradient
may result in equilibrium
(a dynamic balance of concentration)
Simple diffusionis passive movement of
solutes through a membrane
HIGH concentration
LOW concentration
Concentration gradient
Channel
SAMEconcentration
SAMEconcentration
Equilibrium
NET movement
Channel
HIGH concentration
LOW concentration
Concentration gradient
GATEDchannel
Channels are SPECIFIC
GATEDchannels
Channels FACILITATE diffusion
HIGH concentration
LOW concentration
Concentration gradient
NO net movement
ImpermeantSolute
Impermeant solutes cannot cross the
membrane
Aquaporins are tiny channels that facilitate
water movement
ImpermeantSolute
Water moleculeLOW
concentrationHIGH
concentrationWATER gradient
SAME concentration
SAME concentration
Osmosis is passive movement of water when solutes are impermeant
Osmotic pressure builds up as water
moves into cell
SAMEconcentration
SAMEconcentration
Equilibrium
NET movement
HIGH concentration
LOW concentration
Concentration gradient
Carrier
Carrier
Carriers FACILITATE diffusion
HIGH concentration
LOW concentration
Concentration gradient
Carrier
Carriers FACILITATE diffusion
HIGH concentration
LOW concentration
Concentration gradient
HIGH concentration
LOW concentration
Concentration gradient
Carrier Channel
Channels & carriers FACILITATE diffusion
Active Transport
Requires metabolic energy(in the form of ATP)provided by the cell
ATP
ADPPi
Pump
Pumps areACTIVE carriers
LOW concentration
HIGHconcentration
Concentration gradient
ATP
ADPPi
Pump
Pumps areACTIVE carriers
LOW concentration
HIGHconcentration
Concentration gradient
Pumpscreate & maintain a
concentration gradient
Vesicle-mediated transport
Bulk transport of materialRequires work by the cytoskeleton
Endocytosismoves material
into the cell
Endocytosismoves material
into the cell
Cytoskeleton moves the plasma
membrane
ATP
ADPPi
Cytoskeleton moves the plasma
membrane
Cytoskeleton moves the plasma
membrane
Vesicleforms as membrane
folds inward
Vesicleforms as membrane
folds inward
Vesicleforms as membrane
folds inward
Vesicleforms as membrane
folds inward and is pulled inward by the cytoskeleton
Pinocytosismoves fluidsinto the cell
ATP
ADPPi
Pinocytosismoves fluidsinto the cell
Pinocytosismoves fluidsinto the cell
Pinocytosismoves fluidsinto the cell
Pinocytosismoves fluidsinto the cell
Pinocytosismoves fluidsinto the cell
Phagocytosismoves solidsinto the cell
Phagocytosismoves solidsinto the cell
ATP
ADPPi
Phagocytosismoves solidsinto the cell
Phagocytosismoves solidsinto the cell
Phagocytosismoves solidsinto the cell
Phagocytosismoves solidsinto the cell
Phagocytosismoves solidsinto the cell
Exocytosismoves materialout of the cell
ATP
ADPPi
Exocytosismoves materialout of the cell
Exocytosismoves materialout of the cell
Exocytosismoves materialout of the cell
Exocytosismoves materialout of the cell
Exocytosismoves materialout of the cell
Exocytosismoves materialout of the cell
Recommended