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“Nothing will work unless you do.” ~ Maya Angelou Tuesday, October 8, 2013 S.C. Standards for Today: B-2: The student will demonstrate an understanding of the structure and function of cells and their organelles. Today’s Objectives: Cell Rubric Finish Egg Osmometer Lab Discuss Active Transport Create a Mind Map on the different types of transport Reminder: Cell Project Due 10/16/13! Warm Up: 1.What are the three types of passive transport? 2.What is the function of the lysosome? 3.What happened to your jar full of beans and sand?
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Active Transport
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against Transport of molecules against a concentration gradient (from regions of low concentration to regions of high concentration) with the aid of proteins in the cell membrane and energy from ATP
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Cell Membrane Pumps Carrier proteins move substances from low concentration to a higher concentration Ex: Sodium-Potassium Pump 2 Na + pumped out of the cell 2K + pumped into the cell
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Sodium Potassium Pump
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Endocytosis Importing larger quantities of materials by infoldings of the cell membrane Phagocytosis: “cell eating” Cell membrane surrounds the food and buds off a vacuole. Lysosomes then secrete enzymes into a vacuole to digest food
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Endocytosis
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Importing larger quantities of materials by infoldings of the cell membrane Pinocytosis: “cell drinking” Smaller infoldings allows droplets of liquid to enter
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Exocytosis Large quantities of substances exiting the cell Dumping of excretions or wastes outside Secretion of products needed elsewhere (example: new proteins, hormones, etc.)
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Exocytosis
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Active Transport
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Summary of Transport MethodEnergy Required? MoleculesConcentration Gradient Passive Transport NoVery SmallDown Active Transport YesSmall/LargeUp
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Transport Mind-Map Create a mind map using the following words: Endocytosis Fusion of vesicle to plasma membrane Pinocytosis Facilitated Diffusion Simple Diffusion Hypertonic Goes against gradient Movement directly thru membrane Non-polar and small polar substances Uses transport proteins Movement of water through a semi-permeable membrane Isotonic Active Phagocytosis Solids Liquids Exocytosis Na/K pump Requires ATP Osmosis Passive Formation of vesicles from plasma membrane Hypotonic
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