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Cell Transport1

Cell TransportDefinition:The movement of substances within a cell, and the movement of substances into and out of a cell.Passive Transport & Active Transport2 Types:Example: Animal Cell: Into the Cell Out of Cell C6H12O6 + O2 CO2 + H2O 4Active TransportDefinition:When a cell uses energy to move substances.Moving substances from an area of low concentration to an area of high concentrationExample:When a paramecium excretes water from its contractile vacuole5Passive TransportDefinition:When substances move into and out of a cell because of diffusion and osmosis.Does not require energy (ATP)Random motion of molecules leads to dispersal2 Types:DiffusionOsmosis

6DiffusionDefinition:A form of Passive TransportWhen substances move from an area of higher concentration to an area of lower concentration.What is concentration?

7BeforeAfter

High ConcentrationOf Fart MoleculesLowConcentrationof Fart MoleculesFart Molecules equally spread out throughout the classroomEquilibriumDefinition:When there is an equal concentration of substances spread throughout an area or container.9OsmosisDefinition:A form of Passive TransportDiffusion in water:When different concentrations of dissolved substances in water (a solution) causes water to move from one area to another

3 Types of solutions :1. Hypertonic2. Hypotonic3. Isotonic10

1. Hypertonic SolutionWaterHigh conc. -Low conc. -

BeforeAfterSaltHigh conc. -Low conc. -Inside the cellOutside the cellOverall Water moves out of the cellInside the cellOutside the cellOverall Salt moves into the cell112. Hypotonic SolutionWaterHigh conc. -Low conc. -BeforeAfterSugarHigh conc. -Low conc. -Outside the cellInside the cellOverall Water moves into the cellOutside the cellInside the cellOverall Sugar moves out of the cell

Sugar

123. Isotonic SolutionSame concentration of salt/sugar inside and outside the cell. Molecules continue to move, but overall stay in equilibrium. 13Key Points for Osmosis.What Moves?WaterThe substance dissolved in water which can be sugar, salt, urine etc

What Happens?Water typically moves to the dissolved substance. Example put salt on an eggplant and water will move out of the eggplant to the salt.14Osmosis in Animal CellsDetails:Animal cells have a flexible membrane which can expand and contract.15Osmosis in Animal CellsHypotonicHypertonic16Osmosis in Animal CellsCytolysis:The expansion of a cell due to a hypotonic solution. In some cases the cell may burst.CrenationThe shrinking of a cell due to a hypertonic solution.HypotonicHypertonic17

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This is a freshwater gold fish. What issues will it experience in saltwater and pure water?Osmosis in Plant CellsDetails:Different than animal cells because of a rigid outer wall known as the cell wall. The support of the cell wall prevents the plant cell from major changes in shape and size. 20Osmosis in Plant CellsHypotonicHypertonic

21Osmosis in Plant CellsTurgor PressureThe expansion of the cell membrane causes the cell wall to bend outwardPlasmolysis:The shrinking of the cell membrane causes the cell wall to bend inward

HypotonicHypertonic

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What happened to the plant cell?

Describe why this happened to the plant cell. Did anything leave or go into the cell? ExplainTypes of LiquidsPure WaterWater with no salt or other dissolved substances (100% water)Also known as distilled water

Salt SolutionA solution of water and salt with a high concentration of salt. (80% water, 20% salt)

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Types of LiquidsCell SolutionA solution of water and dissolved substances found in a typical cell. Typically, cells have a small amount of dissolved salt, sugar, wastes, etc..94% water, 6% salt, sugar, and wastes

94% water2% sugar2% wastes2% salt26

Background information for lab experiments:Molasses is a simple sugar (small molecule) Iodine is an indicator for starchIodine which is yellow/orange turns starch blackStarch is a large molecule, made up of many small sugarsPotatoes are made of cells (duh)Answer the conclusion questions in full sentences. If there is a key term (ex. hypotonic, equilibrium, etc...) circle the key term in the sentence.Lab A:Starch and Iodine 30Lab B:Molasses and Water31Lab C:Potato in Potato inDistilled WaterSaltwater32Lab A:Starch and Iodine 33Lab B:Molasses and Water34Lab C:Potato in Potato inDistilled WaterSaltwater35