Transporting Molecules

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Transporting Molecules. Diffusion. http://lhs.lps.org/staff/sputnam/Biology/U3Cell/diffusion_1.png. Animatioin from: http://www.biologycorner.com/resources/diffusion-animated.gif. Molecules move from where theres A LOT to where theres NOT. - PowerPoint PPT Presentation

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<ul><li><p>Transporting Molecules</p></li><li><p>Diffusionhttp://lhs.lps.org/staff/sputnam/Biology/U3Cell/diffusion_1.png</p></li><li><p>Molecules move from where theres A LOT to where theres NOTAnimatioin from: http://www.biologycorner.com/resources/diffusion-animated.gif</p></li><li><p>DIFFUSION across a spaceHappens anytime there is a _____________ in concentration in one place compared to another (________________________)DIFFERENCE= Concentration gradient</p></li><li><p>DIFFUSION across a spaceMolecules move automatically from an area of _______ concentration to an area of ________ concentration</p><p>EX: _____________________ _____________________HigherLowerPerfume, Koolaid, popcorn,BBQ, Bad smell in roomhttp://www.swapmeetdave.com/Humor/Farts.htmhttp://leighhouse.typepad.com/blog/images/kool_aid.jpg</p></li><li><p>Molecules need to move across membranes in cellsImage modiified from: http://www.accessexcellence.org/AB/GG/importProt.html</p></li><li><p>If there is a difference in concentration on two sides of a membraneDiffusion can happen ACROSS A MEMBRANE too!as long as membrane will let molecule through</p></li><li><p>SELECTIVELY PERMEABLE</p></li><li><p>DIFFUSION moves them from HIGHER (lungs) concentration to LOWER concentration (blood)Image modified from: http://www.medaille.edu/vmacer/120_graphic_05oxygen.gifEXAMPLE: Oxygen molecules move automaticallyfrom lungs into blood</p></li><li><p>What if cell needs to move large or polar molecules?</p><p>EX:</p><p>GlucoseAmino acids</p></li><li><p>What if cell needs to move a molecule AGAINST the CONCENTRATION GRADIENT?Example :Glucose into mitochondria(LOW HIGH)Image from: http://www.biologyclass.net/mitochondria.jpg </p></li><li><p>What if cell needs to move molecules really FAST? (cant wait for it to diffuse)Example in cells:Movement of Na + &amp; K+ ions sends nerve signalshttp://www.steve.gb.com/images/science/neuron.png</p></li><li><p>WAYS MOLECULES MOVE ACROSS MEMBRANES PASSIVE TRANSPORT Does NOT require energy ACTIVE TRANSPORTRequires energy</p></li><li><p>Kidspiration by: Riedell</p></li><li><p>Kinds of Passive TransportDiffusionOsmosisFacilitated DiffusionIon Channels</p><p>__________________________________</p><p>___________________________________</p><p>___________________________________</p><p>___________________________________</p></li><li><p>DIFFUSION across a membraneMoves from: HIGHER concentration LOWER Any kind of molecule that can pass through the membrane can do this. EX: ______________ ______________OXYGENCARBON DIOXIDEhttp://www.lionden.com/cell_animations.htm</p></li><li><p>OSMOSIS</p><p>MOVES WATER MOLECULES Across a SEMI-PERMEABLE MEMBRANE</p><p>Moves from HIGHER LOWERhttp://www.Isbu.ac.uk/water/molecule.html</p></li><li><p>What if there is a difference in concentration but solute molecules cant move across a membrane?WATER will move until concentrationreaches equilibrium</p></li><li><p>http://www.sidwell.edu/us/science/vlb6/labs/a_osmosis.gifOsmosis1 </p></li><li><p>OSMOSISHYPERTONIC: Concentration outside cell is ____________________ inside cell</p><p>More water leaves cell than enters so cell ____________GREATER THANshrinksOsmosis4 </p></li><li><p>OSMOSISHYPOTONIC: Concentration outside cell is ________________ inside the cell More water enters than leaves cell so cell will ___________________</p><p>LESS THANSwell biggerOsmosis3 </p></li><li><p>OSMOSISISOTONIC: Concentration outside cell ____________concentration inside cell Water entering = water leaving so cell _____________________EQUALSSTAYS THE SAME SIZE</p></li><li><p>Animal cells= cytolysishttp://www.stchs.org/science/courses/sbioa/metenergy/bloodcells.gif= crenation</p></li><li><p>Plant cells= Plasmolysishttp://www.stchs.org/science/courses/sbioa/metenergy/aplantturgor.gifNo cytolysis/cell wall keeps it from bursting</p></li><li><p>VACUOLES store WATERhttp://www.biology4kids.com/files/cell_vacuole.html_______________________ =Pressure of water molecules pushing against cell wallTURGOR PRESSURE</p></li><li><p>SO WHAT?</p></li><li><p>SO WHAT? Sitting in the bathtub causes your fingers and toes to wrinkle up when water enters your skin cells by osmosisBath water is HYPOTONICcompared to you</p></li><li><p>Kinds of Passive TransportDiffusionOsmosisFacilitated DiffusionIon Channels</p><p>__________________________________</p><p>___________________________________</p><p>___________________________________</p><p>___________________________________</p></li><li><p>Facilitated DiffusionCarrier proteins help diffusion go faster</p></li><li><p>FACILITATED DIFFUSIONPassive = ____________________</p><p>Moves from ________________________</p><p>_____________________ bind molecule, change shape, and release it on other side of membrane (Carrier proteins are _______________ proteins)</p><p>Molecules that move this way in cells:_______________________ NO energy requiredCarrier ProteinsIntegralGLUCOSEHIGH LOW</p></li><li><p>Facilitated DiffusionAnimation from: http://bio.winona.edu/berg/ANIMTNS/facdifan.gif</p></li><li><p>Kinds of Passive TransportDiffusionOsmosisFacilitated DiffusionIon Channels</p><p>__________________________________</p><p>___________________________________</p><p>___________________________________</p><p>___________________________________</p></li><li><p>ION CHANNEL</p></li><li><p>ION CHANNELS_____________transport (no energy required) Molecules move from ___________________</p><p>Small passageways for _______ to get through membrane</p><p>Each ion has own kind of passageway</p><p>Examples in cells: Na+ , Cl- , Ca + + , K + </p><p>PASSIVEHIGH LOWIONS</p></li><li><p>ION CHANNELSSome channels always open</p><p>Some channels have gates that open or close in response to signals</p><p> Animation from: http://www2.uic.edu/~myilma1/ionchannel.gifSIGNALS:stretching of cell membraneelectrical signalschemicals</p></li><li><p>Kidspiration by: Riedell</p></li><li><p>Kinds of Active TransportSodium-Potassium PumpEndocytosis</p><p>Exocytosis</p><p>________________________________________</p><p>___________________________________</p><p>____________________________________</p></li><li><p>SODIUM-POTASSIUM PUMP___________ transport (requires energy from ______)</p><p>Special just for Na+ and K + ions</p><p>Uses integral ___________________ to move molecules</p><p>Examples in nerve cells: Na+ is pumped out of cells at same time K + is taken into cells </p><p>ACTIVECarrier ProteinsATP</p></li><li><p>Na+ and K + PUMPAnimation from: http://www.lionden.com/cell_animations.htm</p></li><li><p>ENDOCYTOSISTakes substances into cell</p><p>_____________transport (requires energy from ATP)</p><p>Uses small membrane sacs to carry substances ______________</p><p>ACTIVE= VESICLEShttp://www.sirinet.net/~jgjohnso/cell.html</p></li><li><p>2 KINDS of ENDOCYTOSISTakes substances into cell</p><p>If taking in: fluid, molecules = ____________________ large particles or whole cells = __________________ </p><p>Examples in cells:one celled organisms eat this waywhite blood cells get rid of bacteria this wayPINOCYTOSISPHAGOCYTOSIS</p></li><li><p>ENDOCYTOSISAnimation from: http://academic.brooklyn.cuny.edu/biology/bio4fv/page/cell-movement.htmlhttp://www.accs.net/users/kriel/chapter%20nine/</p></li><li><p>PHAGOCYTOSISWhite blood cell destroying germs</p></li><li><p>EXOCYTOSISSubstances released outside of cell__________ transport (requires energy)</p><p>Substances move in____________</p><p>Examples in cells:Golgi release packaged proteinsACTIVEVESICLES</p></li><li><p>Exocytosishttp://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBooktransp.html</p></li><li><p>GOLGI BODIES USE EXOCYTOSISAnimation from: http://www.franklincollege.edu/bioweb/A&amp;Pfiles/week04.html</p></li><li><p>Endocytosis &amp; Exocytosishttp://grossmont.gcccd.cc.ca.us/cmilgrim/Bio120/Outline/ Outline2.gif/TransportMedia/EndoExocytosisMovie.htm</p></li></ul>

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