“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.

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Presentation transcript:

“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?

Active Transport

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

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

Sodium Potassium Pump

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

Endocytosis

Importing larger quantities of materials by infoldings of the cell membrane Pinocytosis: “cell drinking” Smaller infoldings allows droplets of liquid to enter

Exocytosis Large quantities of substances exiting the cell Dumping of excretions or wastes outside Secretion of products needed elsewhere (example: new proteins, hormones, etc.)

Exocytosis

Active Transport

Summary of Transport MethodEnergy Required? MoleculesConcentration Gradient Passive Transport NoVery SmallDown Active Transport YesSmall/LargeUp

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