Types of Types of Transport Transport The various ways in The various ways in which particles move in which particles move in and out of cells! and out of cells!
Dec 13, 2015
Types of Types of TransportTransport
The various ways in which The various ways in which particles move in and out of particles move in and out of
cells!cells!
Passive TransportPassive TransportNo Energy is required!No Energy is required!
Moves Moves downdown a a concentration gradientconcentration gradient
(Particles move from high to low (Particles move from high to low concentration)concentration)
Three Types of Passive Transport:Three Types of Passive Transport:
Diffusion, Osmosis, & Facilitated Diffusion, Osmosis, & Facilitated Diffusion, ion channelsDiffusion, ion channels
DiffusionDiffusionDiffusion = net movement of particles from Diffusion = net movement of particles from
an area of high concentration to an area of an area of high concentration to an area of low concentration by low concentration by random motionrandom motion..
Molecules Reach EQUILIBRIUM: concentration Molecules Reach EQUILIBRIUM: concentration of a substance is the same throughout a of a substance is the same throughout a spacespace
. .
OsmosisOsmosis
Osmosis is the movement of Osmosis is the movement of waterwater from an area of high concentration to an from an area of high concentration to an area of lower concentration area of lower concentration
Solute:Solute: Substance that dissolves Substance that dissolves
Solvent:Solvent: Substance dissolving the solute Substance dissolving the solute
Hypertonic:Hypertonic: High amount of solutes High amount of solutes
Hypotonic:Hypotonic: Low amount of solutes Low amount of solutes
Another Example of Another Example of OsmosisOsmosis
Onion Cells in Hypotonic Solution Onion Cells in Hypertonic Solution
Facilitated DiffusionFacilitated DiffusionPASSIVE TRANSPORTPASSIVE TRANSPORT
Diffusion of a particle naturally down a Diffusion of a particle naturally down a concentration gradient using a concentration gradient using a carrier proteincarrier protein
Examples of Examples of Facilitated DiffusionFacilitated Diffusion
Receptor Mediated Facilitated Receptor Mediated Facilitated DiffusionDiffusion – a protein binds to a specific – a protein binds to a specific receptor on the cell membrane causing receptor on the cell membrane causing conformational changes of the associated conformational changes of the associated carrier protein which allows the transport carrier protein which allows the transport to the molecule to the other side of the to the molecule to the other side of the membrane.membrane.
Example: GlucoseExample: Glucose http://video.google.com/videosearch?hl=ehttp://video.google.com/videosearch?hl=e
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Ion ChannelsIon Channels
Small uncharged molecules can easily Small uncharged molecules can easily diffuse across cell membranes. However, diffuse across cell membranes. However, due to the hydrophobic nature of the due to the hydrophobic nature of the lipidslipids that make up cell membranes, water-that make up cell membranes, water-soluble molecules and ions cannot.soluble molecules and ions cannot.
Ion Channels are Ion Channels are hydrophilic thus hydrophilic thus allowing other polarallowing other polar molecules to pass molecules to pass through easily. through easily.
Active TransportActive TransportEnergy Energy ISIS required required
Particles are being moved Particles are being moved AGAINSTAGAINST a a concentration gradientconcentration gradient
(Particles move from low concentration to (Particles move from low concentration to high concentration)high concentration)
Three Types of Active Transport:Three Types of Active Transport:
Protein Pumps, Endocytosis & Protein Pumps, Endocytosis & ExocytosisExocytosis
Sodium-Potassium PumpSodium-Potassium Pump Proteins that use ATP
to carry molecules against a concentration gradient
Na+ out/K+ In Function of Na+/K+
Pump:– Creates an
electrochemical gradient (action potential) sends nerve pulses
http--www.stolaf.edhttp--www.stolaf.edu-people-giannini-flu-people-giannini-flashanimat-transporashanimat-transport-secondary%20actt-secondary%20active%20transport.sive%20transport.swfwf