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Transport across the Cell Membrane. C. Sheffer Thomas High School. Transport of Molecules. Requires no energy. Requires energy. Passive transport. Active transport. Diffusion. Osmosis. The movement of molecules against a concentration gradient. Moving from low concentration to - PowerPoint PPT Presentation
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C. Sheffer Thomas High School
TransportTransport
across theacross the
Cell MembraneCell Membrane
Transport of Molecules
Requires no energy Requires energy
Passive transport Active transport
Diffusion Osmosis
Movement ofmolecules on aconcentrationgradient from
high to lowconcentration
Movement ofwater across a
membranefrom high to
lowconcentration
The movement ofmolecules against a
concentration gradient.Moving from low concentration to
high concentration.Requires energy
input.
Cells use ATP asthe energy source for
active transport.To cell membrane notes
Section 7-3
Osmosis map
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Transport across a cell membrane
The structure of the cell membrane ( a phospholipids bilayer) allows for both active and passive transport across the membrane
Passive transport
Osmosis Diffusion FacilitatedDiffusion
Active transport
Movementof water
across theCell
Membrane
Smallmolecules
such asCO2
diffuseacross
themembrane
Largermolecules suchas glucose aremoved acrossthe membrane
by carrierproteins
without usingenergy
SodiumPotassium
pump
Bulktransport
Moves ionsagainst
concentrationusing ATPfor energy
EndocytosisInto the cell
ExocytosisOut of the cell
END
Outsideof cell
Insideof cell(cytoplasm)
Cellmembrane
Proteins
Proteinchannel Lipid bilayer
Carbohydratechains
Section 7-3The Structure of the Cell Membrane
To concept map
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HighConcentration
LowConcentration
CellMembrane
Glucosemolecules
Proteinchannel
Section 7-3 Facilitated Diffusion
To concept map
Molecule tobe carried
Moleculebeing carried
Energy
Section 7-3
Active Transport
To concept map
